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Spotted goldenthistle
Spotted goldenthistle
Spotted goldenthistle
Spotted goldenthistle
Scolymus maculatus
Also known as : Spotted thistle
Hardiness Zones
Hardiness Zones
6 to 9
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plant_info

Key Facts About Spotted goldenthistle

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Attributes of Spotted goldenthistle

Lifespan
Annual
Plant Type
Herb
Bloom Time
Summer
Plant Height
1.5 m
Flower Color
Yellow
Brown
Leaf type
Deciduous
Ideal Temperature
20 - 35 ℃

Scientific Classification of Spotted goldenthistle

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Distribution of Spotted goldenthistle

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Habitat of Spotted goldenthistle

Waysides and cornfields on dry soils
Northern Hemisphere
South Hemisphere

Distribution Map of Spotted goldenthistle

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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Questions About Spotted goldenthistle

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Watering Watering Watering
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
What is the best way to water my Spotted goldenthistle?
To water Spotted goldenthistle, you can use a garden hose with a spray nozzle, a watering can, or just about any other common watering tool. Generally, Spotted goldenthistle is not too picky about how they receive their water, as they can live off of rainwater, tap water, or filtered water. Often, you should try not to water this plant from overhead, as doing so can damage the leaves and flowers and may lead to disease as well. At times, the best method for watering this plant is to set up a drip irrigation system. These systems work well for Spotted goldenthistle as they apply water evenly and directly to the soil. For one Spotted goldenthistle that grows in a container, you can use a similar watering approach while changing the tools you use. To water a container-grown Spotted goldenthistle, use a cup, watering can, or your tap to apply water directly to the soil.
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What should I do if I water my Spotted goldenthistle too much or too little?
The remedy for underwatering Spotted goldenthistle is somewhat obvious. When you notice that your plant lacks moisture, simply begin watering it on a more regular basis. The issue of overwatering can be a much more dire situation, especially if you fail to notice it early. When your Spotted goldenthistle is overwatered, it may contract diseases that lead to its decline and death. The best way to prevent this outcome is to choose a proper growing location, one that receives plenty of sunlight to help dry the soil and has good enough drainage to allow excess water to drain rather than pooling and causing waterlogged soils. If you overwater your Spotted goldenthistle that lives in a pot, you may need to consider changing it to a new pot. Your previous container may not have contained soil with good drainage or may not have had sufficient drainage holes. As you repot your overwatered Spotted goldenthistle, make sure to add loose soils and to use a pot that drains efficiently.
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How often should I water my Spotted goldenthistle?
Spotted goldenthistle needs water regularly throughout the growing season. Beginning in spring, you should plan to water this plant about once per week. As the season presses on and grows warmer, you may need to increase your watering rate to about two to three times per week. Exceeding at this rate can be detrimental to your Spotted goldenthistle. With that said, you should also ensure that the soil in which your Spotted goldenthistle grows remains relatively moist but not wet, regardless of how often you must water to make that the case. Watering Spotted goldenthistle that lives in a pot is a bit different. Generally, you'll need to increase your watering frequency, as the soil in a pot can heat up and dry out a bit faster than ground soil. As such, you should plan to water a container-grown Spotted goldenthistle a few times per week in most cases, versus just once per week for an in-ground plant.
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How much water does my Spotted goldenthistle need?
There are a few different ways you can go about determining how much water to give to your Spotted goldenthistle. Some gardeners choose to pick their water volume based on feeling the soil for moisture. That method suggests that you should water until you feel that the first six inches of soil have become moist. Alternatively, you can use a set measurement to determine how much to water your Spotted goldenthistle. Typically, you should give your Spotted goldenthistle about two gallons of water per week, depending on how hot it is and how quickly the soil becomes dry. However, following strict guidelines like that can lead to overwatering if your plant requires less than two gallons per week for whatever reason. When growing Spotted goldenthistle in a container, you will need to use a different method to determine how much water to supply. Typically, you should give enough water to moisten all of the layers of soil that have become dry. To test if that is the case, you can simply stick your finger in the soil to feel for moisture. You can also water the soil until you notice a slight trickle of excess water exiting the drainage holes of your pot.
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How can I tell if i'm watering my Spotted goldenthistle enough?
It can be somewhat difficult to avoid overwatering your Spotted goldenthistle. On the one hand, these plants have relatively deep roots that require you to moisten the soil weekly. On the other hand, Spotted goldenthistle are plants that are incredibly susceptible to root rot. Along with root rot, your Spotted goldenthistle may also experience browning as a result of overwatering. Underwatering is far less likely for your Spotted goldenthistle as these plants can survive for a while in the absence of supplemental watering. However, if you go too long without giving this plant water, it will likely begin to wilt. You may also notice dry leaves.
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How should I water my Spotted goldenthistle through the seasons?
You can expect your Spotted goldenthistle’s water needs to increase as the season moves on. During spring, you should water about once per week. Then, as the summer heat arrives, you will likely need to give a bit more water to your Spotted goldenthistle, at times increasing to about three times per week. This is especially true of Spotted goldenthistle that grow in containers, as the soil in a container is far more likely to dry out faster than ground soil when the weather is warm. In autumn, while your Spotted goldenthistle is still in bloom, it may need a bit less water as the temperature has likely declined, and the sun is no longer as strong as it was in summer.
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How should I water my Spotted goldenthistle at different growth stages?
Spotted goldenthistle will move through several different growth stages throughout the year, some of which may require more water than others. For example, you will probably start your Spotted goldenthistle as a seed. While the seed germinates, you should plant to give more water than your Spotted goldenthistle will need later in life, watering often enough to maintain consistent soil moisture. After a few weeks, your Spotted goldenthistle will grow above the soil and may need slightly less water than at the seedling phase. Then, once this plant is mature, you can begin to use the regular watering frequency of about once per week. As flower development takes place, you may need to give slightly more water to aid the process.
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What's the difference between watering Spotted goldenthistle indoors and outdoors?
There are several reasons why most Spotted goldenthistle grow outdoors rather than indoors. The first is that these plants typically grow to tall. The second reason is that Spotted goldenthistle needs more daily sunlight than most indoor growing locations can provide. If you are able to provide a suitable indoor growing location, you may find that you need to give your Spotted goldenthistle water a bit more often than you would in an outdoor growing location. Part of the reason for this is that indoor growing locations tend to be a lot drier than outdoor ones due to HVAC units. The other reason for this is that soil in containers can dry out relatively quickly as well compared to soil in the ground.
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More Info on Spotted Goldenthistle Growth and Care

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Basic Care Guide
Transplant
12-18 inches
For the best start, plant spotted goldenthistle from mid-spring to late spring, a period of awakening growth. Choose a sunny spot with well-drained soil to encourage robust development. Friendly tip: ensure soil is moist for optimal transplant success.
Transplant Techniques
Temperature
0 - 38 ℃
Spotted goldenthistle is a plant that thrives in a temperate environment with temperatures ranging from 68 to 95 °F (20 to 35 ℃). It prefers warm conditions and may require temperature adjustments during colder seasons.
Temp for Healthy Growth
Pruning
Spring, Summer, Fall
With its distinctive spiny foliage and yellow flowers, spotted goldenthistle benefits from pruning to maintain shape and promote healthy growth. Prune in spring to remove dead or damaged stems, in summer to shape, and in fall to prepare for dormancy. During pruning, target old flowering stems and any misplaced growth to enhance air circulation and reduce disease risk. Pruning not only invigorates spotted goldenthistle but also controls its spread in the garden.
Pruning techniques
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Plants Related to Spotted goldenthistle

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Common goldenthistle
Common goldenthistle
Common goldenthistle (Scolymus hispanicus) is a prickly Mediterranean herb with bright yellow flowers. In spite of its fearsome appearance, it has long been consumed in Europe, both raw or cooked in salads, soups, and stews. It can grow in poor soil and disturbed land, spreads easily, and has been listed as invasive in some western American states as well as Australia.
Soldier thistle
Soldier thistle
A type of flowering thistle, soldier thistle (Picnomon acarna) might be best known as an agricultural nuisance in its native Middle East as well as in Australia, where it has been introduced. In addition to long, sharp spines that can injure humans, pets, and livestock, soldier thistle competes with crops and can become entangled in machinery during harvest.
Glaucous star thistle
Glaucous star thistle
Glaucous star thistle (Carthamus glaucus) gets its specific Latin name glaucus, which means gray, from its grey-green leaves. These spiked leaves also form a star shape, which explains why it is often called a "star thistle." This plant has been introduced to Australia where it is reported as an invasive species that threatens native plants.
Woolly distaff thistle
Woolly distaff thistle
With long, thin, spiny stems and leaves, woolly distaff thistle (Carthamus lanatus) can quickly create monocultural thickets. It is an unwelcome weed in North America and Australia, where it can injure livestock and crowd out native plants. It takes its name from the dense hairs along its stem.
Tournefort's gundelia
Tournefort's gundelia
Tournefort's gundelia (Gundelia tournefortii) features not only spiky leaves but an intimidating flowerhead with spiky bracts surrounding its dainty flowers. A high count of tournefort's gundelia pollen grains near the Shroud of Turin have led some Biblical believers to suggest the plant might have been used to form Jesus's crown of thorns.
Spiny cocklebur
Spiny cocklebur
Spiny cocklebur (Xanthium spinosum) is largely considered a highly invasive weed that is found throughout the world. It produces prickly seed pods that become caught on passing animals and are then dispersed over a great distance. The burrs on the seed pods can damage sheep’s wool, making it an expensive weed for some farmers to deal with.
Mexican prickly poppy
Mexican prickly poppy
Argemone mexicana has been naturalized in many parts of the world. It is extremely tolerant of drought and poor soil, but is poisonous to grazing animals. Its seed pods secrete a pale yellow latex when cut open. In India, the mexican prickly poppy is used in the Holika Dahan festival, in which adults and children worship by offering flowers.
Pale mexican pricklypoppy
Pale mexican pricklypoppy
It is a herbaceous plant that reaches a size of up to 1 m in height, with blue-whitish, thorny stems; when it is cut, a milky yellow juice emerges. The leaves have divisions with teeth and a spine on the tip; its flowers are yellow, cream or white, lonely and large, they look like paper.
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Related Plants
Spotted goldenthistle
Spotted goldenthistle
Spotted goldenthistle
Spotted goldenthistle
Scolymus maculatus
Also known as: Spotted thistle
Hardiness Zones
Hardiness Zones
6 to 9
more
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Key Facts About Spotted goldenthistle

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Attributes of Spotted goldenthistle

Lifespan
Annual
Plant Type
Herb
Bloom Time
Summer
Plant Height
1.5 m
Flower Color
Yellow
Brown
Leaf type
Deciduous
Ideal Temperature
20 - 35 ℃
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Scientific Classification of Spotted goldenthistle

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distribution

Distribution of Spotted goldenthistle

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Habitat of Spotted goldenthistle

Waysides and cornfields on dry soils
Northern Hemisphere
South Hemisphere

Distribution Map of Spotted goldenthistle

distribution map
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
question

Questions About Spotted goldenthistle

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Feedback
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Watering Watering Watering
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
What is the best way to water my Spotted goldenthistle?
more
What should I do if I water my Spotted goldenthistle too much or too little?
more
How often should I water my Spotted goldenthistle?
more
How much water does my Spotted goldenthistle need?
more
How can I tell if i'm watering my Spotted goldenthistle enough?
more
How should I water my Spotted goldenthistle through the seasons?
more
How should I water my Spotted goldenthistle at different growth stages?
more
What's the difference between watering Spotted goldenthistle indoors and outdoors?
more
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More Info on Spotted Goldenthistle Growth and Care

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Basic Care Guide
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Plants Related to Spotted goldenthistle

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Temperature
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Requirements
Ideal
Tolerable
Unsuitable
Just like people, each plant has its own preferences. Learn about your plants' temperature needs and create a comforting environment for them to flourish. As you care for your plants, your bond with them will deepen. Trust your intuition as you learn about their temperature needs, celebrating the journey you share. Lovingly monitor the temperature around your plants and adjust their environment as needed. A thermometer can be your ally in this heartfelt endeavor. Be patient and gentle with yourself as you explore your plants' temperature needs. Cherish your successes, learn from challenges, and nurture your garden with love, creating a haven that reflects the warmth of your care.
Essentials
Spotted goldenthistle is a plant that thrives in a temperate environment with temperatures ranging from 68 to 95 °F (20 to 35 ℃). It prefers warm conditions and may require temperature adjustments during colder seasons.
Regional wintering strategies
Spotted goldenthistle has strong cold resistance, so special frost protection measures are usually not necessary during winter. However, if the winter temperatures are expected to drop below {Limit_growth_temperature}, it is still important to provide cold protection. This can be achieved by covering the plant with materials such as soil or straw. Before the first freeze in autumn, it is recommended to water the plant abundantly, ensuring the soil remains moist and enters a frozen state. This helps prevent drought and water scarcity for the plant during winter and early spring.
Important Symptoms
Symptoms of Low Temperature in Spotted goldenthistle
Spotted goldenthistle is cold-tolerant and thrives best when the temperature is above {Suitable_growth_temperature_min}. During winter, it should be kept above {Tolerable_growing_temperature_min}. When the temperature falls below {Limit_growth_temperature}, although there may not be any noticeable changes during winter, there may be a decrease in sprouting or even no sprouting during springtime.
Solutions
In spring, remove any parts that have failed to sprout.
Symptoms of High Temperature in Spotted goldenthistle
During summer, Spotted goldenthistle should be kept below {Suitable_growth_temperature_max}. When the temperature exceeds {Tolerable_growing_temperature_max}, the leaves of the plant may become lighter in color, prone to curling, susceptible to sunburn, and in severe cases, the entire plant may wilt and become dry.
Solutions
Trim away the sunburned and dried-up parts. Move the plant to a location that provides shade from the midday and afternoon sun, or use a shade cloth to create shade. Water the plant in the morning and evening to keep the soil moist.
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