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Bigleaf hydrangea 'Pia'
Bigleaf hydrangea 'Pia'
Bigleaf hydrangea 'Pia'
Hydrangea macrophylla 'Pia'
Also known as : Lacecap hydrangea 'Pia', Hortensia 'Pia'
Hardiness Zones
Hardiness Zones
7 to 9
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Care Guide for Bigleaf hydrangea 'Pia'

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Watering Care
Watering Care
Details on Watering Care Watering Care
Soil Care
Soil Care
Clay, Loam, Neutral
Details on Soil Care Soil Care
Ideal Lighting
Ideal Lighting
Full sun, Partial sun
Details on Sunlight Requirements Ideal Lighting
Ideal Temperature
Ideal Temperature
7 to 9
Details on Temperature Ideal Temperature
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Bigleaf hydrangea 'Pia'
Water
Water
Twice per week
Hardiness Zones
Hardiness Zones
7 to 9
plant_info

Key Facts About Bigleaf hydrangea 'Pia'

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Attributes of Bigleaf hydrangea 'Pia'

Lifespan
Perennial
Plant Type
Shrub
Plant Height
1 m
Spread
1 m
Leaf Color
Green
Flower Size
10 cm
Flower Color
Purple
Pink
Cream
Leaf type
Deciduous
Ideal Temperature
15 - 35 ℃

Scientific Classification of Bigleaf hydrangea 'Pia'

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Common Pests & Diseases About Bigleaf hydrangea 'Pia'

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Common issues for Bigleaf hydrangea 'Pia' based on 10 million real cases
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Treat and prevent plant diseases.
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Whole leaf withering
Whole leaf withering is a disease impacting Bigleaf hydrangea 'Pia' by causing premature leaf drop and browning. This compromises the plant's aesthetic value and vigor, leading to reduced flowering.
Wilting after blooming
Wilting after blooming Wilting after blooming
Wilting after blooming
Flowers may wither for a variety of reasons.
Solutions: Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water. Water according to recommendations for each plant's species. Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too. Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants. Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
Brown spot
Brown spot Brown spot
Brown spot
This infection can cause brown spots or patches to appear on the plant.
Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Flower withering
Flower withering Flower withering
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
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plant poor
Whole leaf withering
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
What is Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
Whole leaf withering is a disease impacting Bigleaf hydrangea 'Pia' by causing premature leaf drop and browning. This compromises the plant's aesthetic value and vigor, leading to reduced flowering.
Symptom Analysis
Symptom Analysis
In Bigleaf hydrangea 'Pia', whole leaf withering manifests as rapid browning and drying of leaves, followed by leaf fall. The plant also shows stunted growth and sparse flowering.
What Causes Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
What Causes Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
1
Environmental stress
Factors such as drought, excess sunlight, and poor soil conditions can lead to whole leaf withering.
2
Pathogens
Fungal or bacterial infections that thrive in compromised plant conditions can exacerbate the symptoms.
How to Treat Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
How to Treat Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
1
Non pesticide
Proper watering: Maintain consistent soil moisture without overwatering to avoid stress.

Shade provision: Provide partial shade to reduce thermal stress during hot conditions.
2
Pesticide
Fungicidal sprays: Use fungicides to manage and mitigate pathogen-induced symptoms.
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Wilting after blooming
plant poor
Wilting after blooming
Flowers may wither for a variety of reasons.
Overview
Overview
Wilting after blooming is sometimes a natural aging process of the flower, while other times it may indicate a problem. Orchids, for example, can bloom for anywhere from two weeks to three months, so wilting after a few days signals a problem for most varieties. This can happen to virtually any ornamental flowering plant, but those with shallow roots and limited tolerance for drought, full sun, and low humidity are more susceptible.
This is a common problem, and often has an easy fix. Sometimes, however, it is the result of more serious causes such as pests or disease of the root system.
Symptom Analysis
Symptom Analysis
  • At first, flowers may look a little limp.
  • Petals may start to appear dried out and turn brown.
  • Eventually they may drop off the plant all together.
Disease Cause
Disease Cause
Wilting blooms can be a sign of an unhealthy root system. Any condition that prevents the plant from absorbing enough water and nutrition can result in wilting blooms and sometimes other symptoms. If the plant doesn’t have enough water, it cannot maintain appropriate pressure within stems, leaves, and blooms, causing them to wilt.
This can result from physical damage – for example from root breakage during re-potting or attack by insects like cutworms. If you recently re-potted your plant, physical damage to the roots is a likely cause. If you see insects, they may be eating leaves, roots, or flowers. Fungal infections can also cause root rot and damage, preventing water and nutrient uptake.
Finally, wilting blooms can result simply from age. If no other symptoms are visible, it may simply signal the natural end of the flower’s lifespan. If it seems premature, this may be caused by environmental factors: water, humidity, light, or stress. Under-watering is a common cause. Similarly, plants adapted to high humidity dry out easily when humidity is low, like during winter or in dry climates. Too much light can also stress plants that need shade, causing blooms to wilt.
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Brown spot
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Brown spot
This infection can cause brown spots or patches to appear on the plant.
Overview
Overview
Discolored spots on the foliage of plants are one of the most common disease problems people observe. These spots are caused by fungal and bacterial diseases, with most infections related to a fungal pathogen.
Brown spot can occurs on all houseplants, flowering ornamentals, vegetable plants, and leaves of trees, bushes, and shrubs. No plants are resistant to it, and the problem is worse in warm, wet environments. It can occur at any point in the life stage as long as leaves are present.
Small brownish spots appear on the foliage and enlarge as the disease progresses. In severe cases, the plant or tree is weakened when the lesions interrupt photosynthesis or cause defoliation.
Symptom Analysis
Symptom Analysis
In most cases, brown spot only affects a small percentage of the whole plant, appearing on a small amount of the leaves. A small infection only puts minor stress on the plant. However, if left untreated and the disease progresses over numerous seasons, it will severely impact the health and productivity of the infected specimen.
  • Sporulation begins (reproduction of the fungal spores), and tiny spots appear on leaves.
  • Placement is often random and scattered as diseases are spread through raindrops.
  • May appear on lower leaves and the interior of the plant where humidity is higher.
  • Brown spots enlarge and grow large enough to touch neighboring spots to form a more prominent blotch.
  • Leaf margins may turn yellow.
  • Tiny black dots (fruiting bodies of the fungi) appear in the dead spots.
  • Blotches grow in size until the entire leaf is brown.
  • The leaf falls off the plant.
Severe Symptoms
  • Partial or complete premature defoliation
  • Reduced growth
  • Increased susceptibility to pests and other diseases
Disease Cause
Disease Cause
Brown spot, or leaf spot, is a common descriptive term given to several diseases affecting the leaves of plants and trees. Around 85% of diseases exhibiting leaf spots are due to fungus or fungus-like organisms. Sometimes brown spot is caused by a bacterial infection, or insect activity with similar symptoms.
When conditions are warm and the leaf surfaces are wet, fungal spores being transported by wind or rain land on the surface and cling to it. They do not rupture the cell walls but grow in the space between the plant plasma membrane and the plant cell wall. As the spores reproduce, they release toxins and enzymes that cause necrotic spots (i.e., dead tissue) on the leaves, allowing the fungi to consume the products released when the cells degrade.
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Flower withering
plant poor
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
  • Wilted, droopy flowers
  • Petals and leaves begin to wrinkle
  • Brown papery streaks or spots appear on the petals and leaf tips
  • Flowerhead shrink in size
  • Petal color fades
  • Yellowing leaves
  • Complete death of the flower
Disease Cause
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
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More Info on Bigleaf Hydrangea 'pia' Growth and Care

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Basic Care Guide
Common Pests & Diseases
Transplant
3-4 feet
The optimal timeframe for transplanting bigleaf hydrangea 'Pia' is when spring blossoms fade or autumn's touch is mild, providing balance without extreme temps. Choose spots with rich soil and dappled light. Gentle care during transition nurtures root settling and reduces stress.
Transplant Techniques
Propagation
Spring,Summer
Bigleaf hydrangea 'Pia' is propagated through cuttings, which involves taking a healthy stem and ensuring that it has a few sets of leaves. For optimal results, it's advised to select semi-hardwood stems and to use a rooting hormone to enhance root development. Cuttings should be planted in a mixture of peat and perlite to retain moisture while draining excess water. Keeping the soil consistently moist and providing indirect light encourages successful rooting.
Propagation Techniques
Whole leaf withering
Whole leaf withering is a disease impacting Bigleaf hydrangea 'Pia' by causing premature leaf drop and browning. This compromises the plant's aesthetic value and vigor, leading to reduced flowering.
Read More
Spots
Spots is a common plant disease that affects Bigleaf hydrangea 'Pia', resulting in blemish-like discolorations on the foliage, causing the plant to lose its charm. If left untreated, it may lead to a decline in overall plant health.
Read More
Interveinal yellowing
Interveinal yellowing in Bigleaf hydrangea 'Pia' causes the leaf tissue between the veins to turn yellow, potentially inhibiting growth and affecting bloom quality. Essential for maintaining plant aesthetics and health.
Read More
Notch
Notch disease, a significant fungal infection, targets Bigleaf hydrangea 'Pia', causing leaf discoloration, reduced blooms, and growth stunting. This disease not only affects plant aesthetics but also its overall health and vigor.
Read More
Leaf drooping
Leaf drooping in Bigleaf hydrangea 'Pia' refers to the sagging or wilting of leaves. Common during stress conditions, it impacts the plant's aesthetics and overall health but is often reversible with proper care.
Read More
Non-base branch withering
Non-base branch withering primarily affects 'Bigleaf hydrangea 'Pia'' by causing sudden and severe wilting of the branches. This disease disrupts nutrient flow and can lead to branch death if untreated.
Read More
Leaf white mold
Leaf white mold is a fungal disease affecting Bigleaf hydrangea 'Pia', caused primarily by the fungus Ramularia hydrangeae. It can severely damage the plant's aesthetic appeal by producing white powdery spots on the leaves, ultimately causing necrosis if not treated effectively.
Read More
Mealybug
Mealybug disease significantly affects 'Bigleaf hydrangea 'Pia'', causing stunted growth and leaf discoloration. This pest is more prevalent during warm, humid conditions and can lead to severe damage if left untreated.
Read More
Stem blackening
Stem blackening in Bigleaf hydrangea 'Pia' is a disease characterized by dark discoloration of the stems, leading to weakened plant structure and reduced flowering. It primarily affects the plant's aesthetics and health, potentially causing severe damage if untreated.
Read More
Leaf tip withering
Leaf tip withering is a condition affecting Bigleaf hydrangea 'Pia' that results in the browning and dryness of leaf tips, often impairing plant vigor and aesthetics.
Read More
Aphid
Aphids are small sap-sucking pests that primarily target the leaves and stems of Bigleaf hydrangea 'Pia'. They weaken the plant, causing curled leaves, stunted growth, and potentially leading to sooty mold from honeydew excretions.
Read More
Flower withering
Flower withering in Bigleaf hydrangea 'Pia' is a distressing disease that results in the premature wilting and browning of blossoms. The impact can be extensive, affecting the plant's aesthetics and overall health. Climate, watering practices, and pathogenic factors often contribute to this condition.
Read More
Scars
Scars on Bigleaf hydrangea 'Pia' are primarily superficial abnormalities affecting the aesthetics and vigor of the plant. They manifest as discolored, textured patches on leaves and stems, often impacting overall plant health.
Read More
Yellow edges
Yellow edges is a common disease that affects Bigleaf hydrangea 'Pia', causing the margins of the leaves to turn yellow. If left untreated, it could lead to deterioration of plant health and significantly impact its growth and flowering.
Read More
Wounds
Wounds on Bigleaf hydrangea 'Pia' often result from accidental damage or poor pruning practices. These open injuries expose the plant to potential pathogens, invite pest infestations, and may cause severe complications like rot or disease infection, affecting its overall health and development.
Read More
Branch withering
Branch withering is a detrimental disease affecting Bigleaf hydrangea 'Pia', characterized by the progressive dieback of branches, leading to diminished blooms and potentially plant death if unmanaged.
Read More
Black mold
Black mold is a fungal infection primarily caused by sooty molds that affects Bigleaf hydrangea 'Pia', leading to aesthetic degradation and potential weakening of the plant. Prevention and timely intervention are crucial for managing its impact.
Read More
Leaf blotch
Leaf blotch is a fungal disease that primarily affects Bigleaf hydrangea 'Pia', leading to discoloration, leaf spots, and premature leaf drop. The disease can hinder the aesthetic and vigor of the plant but is generally non-lethal.
Read More
Leaf yellowing
Leaf yellowing in Bigleaf hydrangea 'Pia' is a sign of stress, often due to nutrient deficiencies. It causes leaves to lose their green color, weakening the plant and reducing its aesthetic appeal.
Read More
Leaf wilting
Leaf wilting in Bigleaf hydrangea 'Pia' is a condition that results in the drooping and withering of foliage, often indicating underlying stress or disease, which can lead to decreased growth and bloom production if not addressed.
Read More
Flower wilting
Flower wilting is a physiological condition affecting Bigleaf hydrangea 'Pia', resulting in drooping and loss of firmness in flowers. Caused by factors such as inadequate watering and pests, this condition severely impacts the visual appearance and health of the plant.
Read More
Scale insect
Scale insects are pests affecting Bigleaf hydrangea 'Pia' by sucking sap, leading to stunted growth, leaf yellowing, and potential death of the plant. Early detection and effective management are key to control.
Read More
Dark blotch
Dark blotch, a fungal disease, is common in Bigleaf hydrangea 'Pia' plants, causing blackish-grey blotches on the leaves, stem, and flowers, leading to premature wilting. Adequate control measures are required to prevent damage and ensure healthy growth.
Read More
Whole plant withering
Whole plant withering in Bigleaf hydrangea 'Pia' is a serious disease that typically leads to rapid and severe decline, causing wilted leaves, stems, and a reduction in blooms. It may result from a range of biotic and abiotic factors and significantly impacts the ornamental value and vigor of the plant.
Read More
Dark spots
Dark spot disease, mainly caused by the fungi Cercospora hydrangeae, notoriously impacts the health and aesthetics of Bigleaf hydrangea 'Pia'. The disease manifests as characteristically dark, purple-black spots on leaves, often followed by premature leaf drop, impacting plant vitality.
Read More
Flower rot
Flower rot is a detrimental disease affecting Bigleaf hydrangea 'Pia', causing brown, decaying blossoms which reduce the plant's vitality and aesthetic appeal. Developed by fungal pathogens, it predominantly appears in humid conditions and can be lethal if untreated.
Read More
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About
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Pests & Diseases
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Bigleaf hydrangea 'Pia'
Bigleaf hydrangea 'Pia'
Bigleaf hydrangea 'Pia'
Hydrangea macrophylla 'Pia'
Also known as: Lacecap hydrangea 'Pia', Hortensia 'Pia'
Hardiness Zones
Hardiness Zones
7 to 9
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Care Guide for Bigleaf hydrangea 'Pia'

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Key Facts About Bigleaf hydrangea 'Pia'

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Attributes of Bigleaf hydrangea 'Pia'

Lifespan
Perennial
Plant Type
Shrub
Plant Height
1 m
Spread
1 m
Leaf Color
Green
Flower Size
10 cm
Flower Color
Purple
Pink
Cream
Leaf type
Deciduous
Ideal Temperature
15 - 35 ℃
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Scientific Classification of Bigleaf hydrangea 'Pia'

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Common Pests & Diseases About Bigleaf hydrangea 'Pia'

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Common issues for Bigleaf hydrangea 'Pia' based on 10 million real cases
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AI-powered plant doctor helps you diagnose plant problems in seconds.
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Whole leaf withering
Whole leaf withering is a disease impacting Bigleaf hydrangea 'Pia' by causing premature leaf drop and browning. This compromises the plant's aesthetic value and vigor, leading to reduced flowering.
Learn More About the Whole leaf withering more
Wilting after blooming
Wilting after blooming Wilting after blooming Wilting after blooming
Flowers may wither for a variety of reasons.
Solutions: Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water. Water according to recommendations for each plant's species. Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too. Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants. Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
Learn More About the Wilting after blooming more
Brown spot
Brown spot Brown spot Brown spot
This infection can cause brown spots or patches to appear on the plant.
Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Learn More About the Brown spot more
Flower withering
Flower withering Flower withering Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Learn More About the Flower withering more
close
plant poor
Whole leaf withering
Overview
Symptom
Causes
Treatment
Prevention
Active Period
What is Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
What is Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
Whole leaf withering is a disease impacting Bigleaf hydrangea 'Pia' by causing premature leaf drop and browning. This compromises the plant's aesthetic value and vigor, leading to reduced flowering.
Symptom Analysis
Symptom Analysis
In Bigleaf hydrangea 'Pia', whole leaf withering manifests as rapid browning and drying of leaves, followed by leaf fall. The plant also shows stunted growth and sparse flowering.
What Causes Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
What Causes Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
1
Environmental stress
Factors such as drought, excess sunlight, and poor soil conditions can lead to whole leaf withering.
2
Pathogens
Fungal or bacterial infections that thrive in compromised plant conditions can exacerbate the symptoms.
How to Treat Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
How to Treat Whole leaf withering Disease on Bigleaf hydrangea 'Pia'?
1
Non pesticide
Proper watering: Maintain consistent soil moisture without overwatering to avoid stress.

Shade provision: Provide partial shade to reduce thermal stress during hot conditions.
2
Pesticide
Fungicidal sprays: Use fungicides to manage and mitigate pathogen-induced symptoms.
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
close
Wilting after blooming
plant poor
Wilting after blooming
Flowers may wither for a variety of reasons.
Overview
Overview
Wilting after blooming is sometimes a natural aging process of the flower, while other times it may indicate a problem. Orchids, for example, can bloom for anywhere from two weeks to three months, so wilting after a few days signals a problem for most varieties. This can happen to virtually any ornamental flowering plant, but those with shallow roots and limited tolerance for drought, full sun, and low humidity are more susceptible.
This is a common problem, and often has an easy fix. Sometimes, however, it is the result of more serious causes such as pests or disease of the root system.
Symptom Analysis
Symptom Analysis
  • At first, flowers may look a little limp.
  • Petals may start to appear dried out and turn brown.
  • Eventually they may drop off the plant all together.
Disease Cause
Disease Cause
Wilting blooms can be a sign of an unhealthy root system. Any condition that prevents the plant from absorbing enough water and nutrition can result in wilting blooms and sometimes other symptoms. If the plant doesn’t have enough water, it cannot maintain appropriate pressure within stems, leaves, and blooms, causing them to wilt.
This can result from physical damage – for example from root breakage during re-potting or attack by insects like cutworms. If you recently re-potted your plant, physical damage to the roots is a likely cause. If you see insects, they may be eating leaves, roots, or flowers. Fungal infections can also cause root rot and damage, preventing water and nutrient uptake.
Finally, wilting blooms can result simply from age. If no other symptoms are visible, it may simply signal the natural end of the flower’s lifespan. If it seems premature, this may be caused by environmental factors: water, humidity, light, or stress. Under-watering is a common cause. Similarly, plants adapted to high humidity dry out easily when humidity is low, like during winter or in dry climates. Too much light can also stress plants that need shade, causing blooms to wilt.
Solutions
Solutions
  • Check the soil or potting medium. Coarse textures can allow water to drain too rapidly, preventing the plant from taking up enough. If the soil and roots seem very dry, add sphagnum moss or other mediums that hold water.
  • Water according to recommendations for each plant's species.
  • Low humidity can be corrected by misting the plant regularly or placing it near a humidifier. Keeping it near other plants helps, too.
  • Keep the environment consistent in terms of temperature, humidity, and lighting. Keep it away from vents, heaters, and air conditioners, and avoid moving it to locations where it will experience a temperature shock. Hot, dry heat, and cold drafts are problematic for many plants.
  • Especially if the plant is outside, it could be experiencing heat or light stress. Try moving it to a shadier location.
Prevention
Prevention
  • Read up on moisture, light, and soil type preferences for each plant to avoid underwatering, incorrect light levels, or other conditions that can cause wilting blooms.
  • Avoid re-potting during the flowering period. This causes additional stress on the plants because they need to repair root damage and adapt to the new micro-environment, all of which can result in wilting.
  • One other potential cause is ethylene gas, a plant hormone related to ripening. Some fruits and vegetables emit ethylene, especially bananas. Apples, grapes, melons, avocados, and potatoes can also give it off, so keep flowering plants away from fresh produce.
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Brown spot
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Brown spot
This infection can cause brown spots or patches to appear on the plant.
Overview
Overview
Discolored spots on the foliage of plants are one of the most common disease problems people observe. These spots are caused by fungal and bacterial diseases, with most infections related to a fungal pathogen.
Brown spot can occurs on all houseplants, flowering ornamentals, vegetable plants, and leaves of trees, bushes, and shrubs. No plants are resistant to it, and the problem is worse in warm, wet environments. It can occur at any point in the life stage as long as leaves are present.
Small brownish spots appear on the foliage and enlarge as the disease progresses. In severe cases, the plant or tree is weakened when the lesions interrupt photosynthesis or cause defoliation.
Symptom Analysis
Symptom Analysis
In most cases, brown spot only affects a small percentage of the whole plant, appearing on a small amount of the leaves. A small infection only puts minor stress on the plant. However, if left untreated and the disease progresses over numerous seasons, it will severely impact the health and productivity of the infected specimen.
  • Sporulation begins (reproduction of the fungal spores), and tiny spots appear on leaves.
  • Placement is often random and scattered as diseases are spread through raindrops.
  • May appear on lower leaves and the interior of the plant where humidity is higher.
  • Brown spots enlarge and grow large enough to touch neighboring spots to form a more prominent blotch.
  • Leaf margins may turn yellow.
  • Tiny black dots (fruiting bodies of the fungi) appear in the dead spots.
  • Blotches grow in size until the entire leaf is brown.
  • The leaf falls off the plant.
Severe Symptoms
  • Partial or complete premature defoliation
  • Reduced growth
  • Increased susceptibility to pests and other diseases
Disease Cause
Disease Cause
Brown spot, or leaf spot, is a common descriptive term given to several diseases affecting the leaves of plants and trees. Around 85% of diseases exhibiting leaf spots are due to fungus or fungus-like organisms. Sometimes brown spot is caused by a bacterial infection, or insect activity with similar symptoms.
When conditions are warm and the leaf surfaces are wet, fungal spores being transported by wind or rain land on the surface and cling to it. They do not rupture the cell walls but grow in the space between the plant plasma membrane and the plant cell wall. As the spores reproduce, they release toxins and enzymes that cause necrotic spots (i.e., dead tissue) on the leaves, allowing the fungi to consume the products released when the cells degrade.
Solutions
Solutions
In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary.
Organic options won’t kill the fungus, but will prevent it from spreading.
  1. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear.
  2. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread.
  3. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Prevention
Prevention
Like many other diseases, it is easier to prevent brown spot than cure it, and this is done through cultural practices.
  • Clear fall leaves from the ground before winter to minimize places where fungi and bacteria can overwinter.
  • Maintain good air movement between plants through proper plant spacing.
  • Increase air circulation through the center of plants through pruning.
  • Thoroughly clean all pruning tools after working with diseased plants.
  • Never dispose of disease plant material in a compost pile.
  • Avoid overhead watering to keep moisture off of the foliage.
  • Keep plants healthy by providing adequate sunlight, water, and fertilizer.
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Flower withering
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Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
  • Wilted, droopy flowers
  • Petals and leaves begin to wrinkle
  • Brown papery streaks or spots appear on the petals and leaf tips
  • Flowerhead shrink in size
  • Petal color fades
  • Yellowing leaves
  • Complete death of the flower
Disease Cause
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
Solutions
Solutions
If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface.
In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well.
If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Prevention
Prevention
This is definitely one of those instances where prevention is more effective than cure. Here are some preventative measures for avoiding premature flower withering.
  • Water plants according to their needs -- either keep the soil slightly moist or allow the top inch or two to dry out before watering again.
  • Fertilize lightly on a consistent basis, depending upon the plant’s growth. Quick-growing plants and those that flower or develop fruit will need more frequent fertilizing than slow-growing plants.
  • Purchase plants that are certified disease- or pathogen-free.
  • Look for disease-resistant cultivars.
  • Isolate plants showing disease symptoms to prevent the spread to neighboring plants.
  • Practice good plant hygiene by removing any fallen plant material as soon as possible.
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care_scenes

More Info on Bigleaf Hydrangea 'pia' Growth and Care

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Basic Care Guide
Common Pests & Diseases
Whole leaf withering
Whole leaf withering is a disease impacting Bigleaf hydrangea 'Pia' by causing premature leaf drop and browning. This compromises the plant's aesthetic value and vigor, leading to reduced flowering.
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Spots
Spots is a common plant disease that affects Bigleaf hydrangea 'Pia', resulting in blemish-like discolorations on the foliage, causing the plant to lose its charm. If left untreated, it may lead to a decline in overall plant health.
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Interveinal yellowing
Interveinal yellowing in Bigleaf hydrangea 'Pia' causes the leaf tissue between the veins to turn yellow, potentially inhibiting growth and affecting bloom quality. Essential for maintaining plant aesthetics and health.
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Notch
Notch disease, a significant fungal infection, targets Bigleaf hydrangea 'Pia', causing leaf discoloration, reduced blooms, and growth stunting. This disease not only affects plant aesthetics but also its overall health and vigor.
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Leaf drooping
Leaf drooping in Bigleaf hydrangea 'Pia' refers to the sagging or wilting of leaves. Common during stress conditions, it impacts the plant's aesthetics and overall health but is often reversible with proper care.
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Non-base branch withering
Non-base branch withering primarily affects 'Bigleaf hydrangea 'Pia'' by causing sudden and severe wilting of the branches. This disease disrupts nutrient flow and can lead to branch death if untreated.
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Leaf white mold
Leaf white mold is a fungal disease affecting Bigleaf hydrangea 'Pia', caused primarily by the fungus Ramularia hydrangeae. It can severely damage the plant's aesthetic appeal by producing white powdery spots on the leaves, ultimately causing necrosis if not treated effectively.
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Mealybug
Mealybug disease significantly affects 'Bigleaf hydrangea 'Pia'', causing stunted growth and leaf discoloration. This pest is more prevalent during warm, humid conditions and can lead to severe damage if left untreated.
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Stem blackening
Stem blackening in Bigleaf hydrangea 'Pia' is a disease characterized by dark discoloration of the stems, leading to weakened plant structure and reduced flowering. It primarily affects the plant's aesthetics and health, potentially causing severe damage if untreated.
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Leaf tip withering
Leaf tip withering is a condition affecting Bigleaf hydrangea 'Pia' that results in the browning and dryness of leaf tips, often impairing plant vigor and aesthetics.
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Aphid
Aphids are small sap-sucking pests that primarily target the leaves and stems of Bigleaf hydrangea 'Pia'. They weaken the plant, causing curled leaves, stunted growth, and potentially leading to sooty mold from honeydew excretions.
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Flower withering
Flower withering in Bigleaf hydrangea 'Pia' is a distressing disease that results in the premature wilting and browning of blossoms. The impact can be extensive, affecting the plant's aesthetics and overall health. Climate, watering practices, and pathogenic factors often contribute to this condition.
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Scars
Scars on Bigleaf hydrangea 'Pia' are primarily superficial abnormalities affecting the aesthetics and vigor of the plant. They manifest as discolored, textured patches on leaves and stems, often impacting overall plant health.
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Yellow edges
Yellow edges is a common disease that affects Bigleaf hydrangea 'Pia', causing the margins of the leaves to turn yellow. If left untreated, it could lead to deterioration of plant health and significantly impact its growth and flowering.
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Wounds
Wounds on Bigleaf hydrangea 'Pia' often result from accidental damage or poor pruning practices. These open injuries expose the plant to potential pathogens, invite pest infestations, and may cause severe complications like rot or disease infection, affecting its overall health and development.
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Branch withering
Branch withering is a detrimental disease affecting Bigleaf hydrangea 'Pia', characterized by the progressive dieback of branches, leading to diminished blooms and potentially plant death if unmanaged.
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Black mold
Black mold is a fungal infection primarily caused by sooty molds that affects Bigleaf hydrangea 'Pia', leading to aesthetic degradation and potential weakening of the plant. Prevention and timely intervention are crucial for managing its impact.
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Leaf blotch
Leaf blotch is a fungal disease that primarily affects Bigleaf hydrangea 'Pia', leading to discoloration, leaf spots, and premature leaf drop. The disease can hinder the aesthetic and vigor of the plant but is generally non-lethal.
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Leaf yellowing
Leaf yellowing in Bigleaf hydrangea 'Pia' is a sign of stress, often due to nutrient deficiencies. It causes leaves to lose their green color, weakening the plant and reducing its aesthetic appeal.
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Leaf wilting
Leaf wilting in Bigleaf hydrangea 'Pia' is a condition that results in the drooping and withering of foliage, often indicating underlying stress or disease, which can lead to decreased growth and bloom production if not addressed.
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Flower wilting
Flower wilting is a physiological condition affecting Bigleaf hydrangea 'Pia', resulting in drooping and loss of firmness in flowers. Caused by factors such as inadequate watering and pests, this condition severely impacts the visual appearance and health of the plant.
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Scale insect
Scale insects are pests affecting Bigleaf hydrangea 'Pia' by sucking sap, leading to stunted growth, leaf yellowing, and potential death of the plant. Early detection and effective management are key to control.
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Dark blotch
Dark blotch, a fungal disease, is common in Bigleaf hydrangea 'Pia' plants, causing blackish-grey blotches on the leaves, stem, and flowers, leading to premature wilting. Adequate control measures are required to prevent damage and ensure healthy growth.
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Whole plant withering
Whole plant withering in Bigleaf hydrangea 'Pia' is a serious disease that typically leads to rapid and severe decline, causing wilted leaves, stems, and a reduction in blooms. It may result from a range of biotic and abiotic factors and significantly impacts the ornamental value and vigor of the plant.
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Dark spots
Dark spot disease, mainly caused by the fungi Cercospora hydrangeae, notoriously impacts the health and aesthetics of Bigleaf hydrangea 'Pia'. The disease manifests as characteristically dark, purple-black spots on leaves, often followed by premature leaf drop, impacting plant vitality.
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Flower rot
Flower rot is a detrimental disease affecting Bigleaf hydrangea 'Pia', causing brown, decaying blossoms which reduce the plant's vitality and aesthetic appeal. Developed by fungal pathogens, it predominantly appears in humid conditions and can be lethal if untreated.
 detail
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