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Asian sword fern
Asian sword fern
Asian sword fern
Asian sword fern
Asian sword fern
Asian sword fern
Asian sword fern
Nephrolepis brownii
Hardiness Zones
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9 to 11
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Key Facts About Asian sword fern

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Attributes of Asian sword fern

Lifespan
Perennial
Plant Type
Herb
Plant Height
61 cm to 91 cm
Leaf type
Semi-evergreen
Ideal Temperature
20 - 38 ℃

Trivia and Interesting Facts

Scientific Classification of Asian sword fern

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Distribution of Asian sword fern

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Habitat of Asian sword fern

Forests
Northern Hemisphere
South Hemisphere

Distribution Map of Asian sword fern

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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Questions About Asian sword fern

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Watering Watering Watering
Sunlight Sunlight Sunlight
Temperature Temperature Temperature
What is the best way to water my Asian sword fern?
When watering the Asian sword fern, you should aim to use filtered water that is at room temperature. Filtered water is better for this plant, as tap water can contain particles that are harmful to its health. The reason that the water should be at room temperature or slightly warmer is that the Asian sword fern comes from a warm environment, and cold water can be somewhat of a shock to its system. Also, you should avoid overhead watering for this plant, as it can cause foliage complications. Instead, simply apply your filtered room temperature water to the soil until the soil is entirely soaked. Soaking the soil can be very beneficial for this plant as it moistens the roots and helps them continue to spread through the soil and collect the nutrients they need.
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What should I do if I water my Asian sword fern too much or too little?
Both overwatering and underwatering will be detrimental to the health of your Asian sword fern, but overwatering is a far more common issue. When this species receives too much water, its stems and leaves may begin to wilt and turn from green to yellow. Overwatering over a prolonged period may also lead to diseases such as root rot, mold, and mildew, all of which can kill your plant. Underwatering is far less common for the Asian sword fern, as this plant has decent drought tolerance. However, underwatering remains a possibility, and when it occurs, you can expect to find that the leaves of your Asian sword fern have become brittle and brown. It is crucial that you notice the signs of overwatering as soon as possible when caring for your Asian sword fern. Some of the diseases that arise from overwatering, such as root rot, may not be correctable if you wait too long. If you see early signs of overwatering, you should reduce your watering schedule immediately. You may also want to assess the quality of soil in which your Asian sword fern grows. If you find that the soil drains very poorly, you should replace it immediately with a loose, well-draining potting mix. On the other hand, if you find signs that your Asian sword fern is receiving too little water, all you need to do is water more regularly until those signs have subsided.
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How often should I water my Asian sword fern?
If your plant is in a pot. The most precise way to decide whether your Asian sword fern needs water is to plunge your finger into the soil. If you notice that the first two to three inches of soil have become dry, it is time to add some water. If you grow your Asian sword fern outdoors in the ground, you can use a similar method to test the soil. Again, when you find that the first few inches of soil have dried out, it is time to add water. During the spring and early fall, this method will often lead you to water this plant about once every week. When extremely hot weather arrives, you may need to increase your watering frequency to about twice or more per week. With that said, mature, well-established the Asian sword fern can show an admirable ability to withstand drought.
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How much water does my Asian sword fern need?
When it comes time to water your Asian sword fern, you should not be shy about how much water you give. With the first two to three inches of soil dry, this plant will appreciate a long and thorough watering. Supply enough water to soak the soil entirely. The amount of water you add should be enough to cause excess water to flow through the drainage holes at the bottom of your pot. If you don’t see excess water draining from the pot, you have likely underwatered your plant. But do not let the water accumulate inside the soil, which will be very dangerous to the plant as well. Alternatively, a lack of water draining through the pot could indicate poorly draining soils, which is detrimental to the health of this plant and should be avoided. If the plant is outside, 1 inch of rain per week will be sufficient.
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How should I water my Asian sword fern at different growth stages?
The water needs of the Asian sword fern can change depending on growth stages as well. For example, when your Asian sword fern is in the first few years of its life, or if you have just transplanted it to a new growing location, you will need to give more water than usual. During both of those stages, your Asian sword fern will put a lot of energy towards sprouting new roots that will then support future growth. For those roots to perform their best, they need a bit more moisture than they would at a more mature phase. After a few seasons, your Asian sword fern will need much less water. Another growth stage in which this plant may need more water is during the bloom period. Flower development can make use of a significant amount of moisture, which is why you might need to give your Asian sword fern more water at this time.
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How should I water my Asian sword fern through the seasons?
The Asian sword fern will have its highest water needs during the hottest months of the year. During the height of summer, you may need to give this plant water more than once per week, depending on how fast the soil dries out. The opposite is true during the winter. In winter, your plant will enter a dormant phase, in which it will need far less water than usual. In fact, you may not need to water this plant at all during the winter months. However, if you do water during winter, you should not do so more than about once per month. Watering too much at this time will make it more likely that your Asian sword fern will contract a disease.
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What's the difference between watering my Asian sword fern indoors and outdoors?
It is most common to grow the Asian sword fern indoors for any gardener that does not live in temperate and tropical regions. Those gardeners should consider the fact that soil in a container can dry out a bit faster than ground soil. Also, the presence of drying elements such as air conditioning units can cause your Asian sword fern to need water on a more frequent basis as well. if you planted it outside. When that is the case, it’s likely you won’t need to water your Asian sword fern very much at all. If you receive rainfall on a regular basis, that may be enough to keep your plant alive. Alternatively, those who grow this plant inside will need to water it more often, as allowing rainwater to soak the soil will not be an option.
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More Info on Asian Sword Fern Growth and Care

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Basic Care Guide
Lighting
Full sun
Asian sword fern flourishes optimally under an unobstructed celestial dome, while accepting conditions of dappled illumination or a predominantly shadowed environment. It's growth can be hindered with an intense exposure or lack of sunlight due to its original habitat's sunlight conditions.
Best Sunlight Practices
Transplant
18-24 inches
For asian sword fern, the period between early and late winter, often dubbed 'the dormancy window,' is prime for relocating. During this time, select a shaded spot with well-draining soil. To encourage robust growth, ensure minimal root disturbance.
Transplant Techniques
Temperature
0 - 43 ℃
Asian sword fern is native to environments that remain in the 68 to 100 °F (20 to 38 ℃) range. It prefers consistent warmth with no sudden temperature drops. Seasonal adjustments may be necessary in colder climates to maintain optimal temperature.
Temp for Healthy Growth
Pruning
Spring, Summer
Characterized by its arching fronds, asian sword fern thrives with regular pruning to remove old or yellowed foliage, encouraging healthy growth. Prune in spring or summer, cutting at the frond's base without damaging new shoots. This maintenance ensures a tidy appearance and can prevent pest infestations. Pruning during active growth phases promotes vigor in asian sword fern, contributing to the longevity and aesthetic quality of the plant.
Pruning techniques
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Plants Related to Asian sword fern

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Common Duckweed
Common Duckweed
Common Duckweed (Lemna minor) are the smallest flowering plants on the planet. The plant is an important food source for both fish and waterfowl. Common Duckweed is used to counteract the effects of agricultural runoff because it removes excessive amounts of nitrogen and phosphorus from waterways.
Coastal plain willow
Coastal plain willow
The coastal plain willow (Salix caroliniana) is a willow species that can grow up to 6 m tall. Small yellow flowers erupt from pliable stems en masse during spring and attract various pollinating insects like butterflies and bees. The branches are beneficial in the construction of fencing, basketry, and other crafts. Coastal plain willow thrives in boggy areas and can tolerate some salt but not full inundation.
Coastal burnweed
Coastal burnweed
Erechtites minimus is native to Australia and New Zealand and has been introduced and naturalized in parts of the American Pacific Northwest. Erechtites minimus flowers in summer and early fall and each plant can produce up to 200 flower heads that are yellow or purple.
Bur Chervil
Bur Chervil
Bur Chervil (Anthriscus caucalis) can be found growing in many lowland environments such as waste ground, farmed fields, roadsides, and grasslands. This plant has a similar appearance to the herb Chervil. Bur Chervil is classed as a weed in California, where it is an introduced species.
Carpet-Grass
Carpet-Grass
Carpet-Grass (Axonopus compressus) is a grass species also known as carpet grass, blanket grass, and lawn grass. It grows in pastures and fields in North America, Europe, and Asia. This plant is occasionally planted on soccer fields.
Brazilian waterweed
Brazilian waterweed
Brazilian waterweed (Egeria densa) is a large-flowered plant that is native to South America, particularly Brazil, Uruguay, and Argentina. It is an invasive species in other areas due to the fact that people use it in aquariums and release it into non-native habitats.
Poison ivy
Poison ivy
In pop culture, poison ivy is a symbol of an obnoxious weed because, despite its unthreatening looks, it gives a highly unpleasant contact rash to the unfortunate person who touches it. Still, it is commonly eaten by many animals, and the seeds are a favorite with birds. The leaves turn bright red in fall. Its sister species, Western poison ivy (Toxicodendron rydbergii), is not considered to be invasive in the United States, but is noxious in Australia and New Zealand.
Pokeweed
Pokeweed
Although its berries look juicy and tempting, the fruits and the root of pokeweed are toxic and should not be eaten. Pokeweed is considered a pest species by farmers but is nevertheless often grown as an ornamental plant. Its berries can be made into pokeberry ink as well.
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Key Facts About Asian sword fern

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Attributes of Asian sword fern

Lifespan
Perennial
Plant Type
Herb
Plant Height
61 cm to 91 cm
Leaf type
Semi-evergreen
Ideal Temperature
20 - 38 ℃
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Trivia and Interesting Facts

Scientific Classification of Asian sword fern

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Distribution of Asian sword fern

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Habitat of Asian sword fern

Forests
Northern Hemisphere
South Hemisphere

Distribution Map of Asian sword fern

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Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
question

Questions About Asian sword fern

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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 Asian sword fern?
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What should I do if I water my Asian sword fern too much or too little?
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How often should I water my Asian sword fern?
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How much water does my Asian sword fern need?
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How should I water my Asian sword fern at different growth stages?
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How should I water my Asian sword fern through the seasons?
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What's the difference between watering my Asian sword fern indoors and outdoors?
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Lighting
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Requirements
Full sun
Ideal
Above 6 hours sunlight
Partial sun, Full shade
Tolerance
About 3-6 hours sunlight
Watch how sunlight gracefully moves through your garden, and choose spots that provide the perfect balance of light and shade for your plants, ensuring their happiness.
Essentials
Asian sword fern flourishes optimally under an unobstructed celestial dome, while accepting conditions of dappled illumination or a predominantly shadowed environment. It's growth can be hindered with an intense exposure or lack of sunlight due to its original habitat's sunlight conditions.
Preferred
Tolerable
Unsuitable
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Artificial lighting
Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
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Indoor plants require adequate lighting for optimal growth. When natural sunlight is insufficient, particularly in winter or in less sunny spaces, artificial lights offer a vital solution, promoting faster, healthier growth.
1. Choose the right type of artificial light: LED lights are a popular choice for indoor plant lighting because they can be customized to provide the specific wavelengths of light that your plants need.
Full sun plants need 30-50W/sq ft of artificial light, partial sun plants need 20-30W/sq ft, and full shade plants need 10-20W/sq ft.
2. Determine the appropriate distance: Place the light source 12-36 inches above the plant to mimic natural sunlight.
3. Determine the duration: Mimic the length of natural daylight hours for your plant species. most plants need 8-12 hours of light per day.
Important Symptoms
Symptoms of Insufficient Light in %s
Asian sword fern thrives in full sunlight but is often cultivated indoors during winter due to sensitivity to cold. This increases the chance of being placed in rooms with inadequate lighting, leading to noticeable symptoms of light deficiency.
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(Symptom details and solutions)
Small leaves
New leaves may grow smaller in size compared to the previous ones once they have matured.
Leggy or sparse growth
The spaces between leaves or stems of your Asian sword fern may become longer, resulting in a thin and stretched-out appearance. This can make the plant look sparse and weak, and it may easily break or lean due to its own weight.
Faster leaf drop
When plants are exposed to low light conditions, they tend to shed older leaves early to conserve resources. Within a limited time, these resources can be utilized to grow new leaves until the plant's energy reserves are depleted.
Slower or no new growth
Asian sword fern enters a survival mode when light conditions are poor, which leads to a halt in leaf production. As a result, the plant's growth becomes delayed or stops altogether.
Lighter-colored new leaves
Insufficient sunlight can cause leaves to develop irregular color patterns or appear pale. This indicates a lack of chlorophyll and essential nutrients.
Solutions
1. To ensure optimal growth, gradually move plants to a sunnier location each week, until they receive at least 6 hours of direct sunlight daily. Use a south-facing window and keep curtains open during the day for maximum sunlight exposure and nutrient accumulation.2. To provide additional light for your plant, consider using artificial light if it's large or not easily movable. Keep a desk or ceiling lamp on for at least 8 hours daily, or invest in professional plant grow lights for ample light.
Symptoms of Excessive light in %s
Asian sword fern thrives in full sun exposure and can tolerate intense sunlight. With their remarkable resilience, symptoms of sunburn may not be easily visible, as they rarely suffer from it.
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(Symptom details and solutions)
Chlorosis
Chlorosis is a condition where the plant's leaves lose their green color and turn yellow. This is due to the breakdown of chlorophyll from excessive sunlight, which negatively affects the plant's ability to photosynthesize.
Sunscald
Sunscald occurs when the plant's leaves or stems are damaged by intense sunlight exposure. It appears as pale, bleached, or necrotic areas on the plant tissue and can reduce the plant's overall health.
Leaf Curling
Leaf curling is a symptom where leaves curl or twist under extreme sunlight conditions. This is a defense mechanism used by the plant to reduce its surface area exposed to sunlight, minimizing water loss and damage.
Wilting
Wilting occurs when a plant loses turgor pressure and its leaves and stems begin to droop. Overexposure to sunlight can cause wilting by increasing the plant's water loss through transpiration, making it difficult for the plant to maintain adequate hydration.
Leaf Scorching
Leaf scorching is a symptom characterized by the appearance of brown, dry, and crispy edges or patches on leaves due to excessive sunlight. This can lead to a reduction in photosynthetic capacity and overall plant health.
Solutions
1. Move your plant to the optimal position where it can receive abundant sunlight but also have some shade. An east-facing window is an ideal choice as the morning sunlight is gentler. This way, your plant can enjoy ample sunlight while reducing the risk of sunburn.2. It is recommended to trim off any completely dehydrated or withered parts of the plant.
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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
Asian sword fern is native to environments that remain in the 68 to 100 °F (20 to 38 ℃) range. It prefers consistent warmth with no sudden temperature drops. Seasonal adjustments may be necessary in colder climates to maintain optimal temperature.
Regional wintering strategies
Asian sword fern is extremely heat-loving, and any cold temperatures can cause harm to it. In the autumn, it is recommended to bring outdoor-grown Asian sword fern indoors and place it near a bright window, but it should be kept at a certain distance from heaters. Maintaining temperatures above {Suitable_growth_temperature_min} during winter is beneficial for plant growth. Any temperatures approaching {Tolerable_growing_temperature_min} are detrimental to the plant.
Important Symptoms
Symptoms of Low Temperature in Asian sword fern
Asian sword fern prefers warm temperatures and is not tolerant of low temperatures. It 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}, the leaves may lighten in color. After frost damage, the color gradually turns brown or black, and symptoms such as wilting and drooping may occur.
Solutions
Trim off the frost-damaged parts. Immediately move indoors to a warm environment for cold protection. Choose a spot near a south-facing window to place the plant, ensuring ample sunlight. Additionally, avoid placing the plant near heaters or air conditioning vents to prevent excessive dryness in the air.
Symptoms of High Temperature in Asian sword fern
During summer, Asian sword fern should be kept below {Suitable_growth_temperature_max}. When the temperature exceeds {Tolerable_growing_temperature_max}, the color of the leaves becomes lighter, and the plant becomes more susceptible to sunburn.
Solutions
Trim away the sunburned and dried-up parts. Move the plant to a location that provides shade from the midday and afternoon sun. Water the plant in the morning and evening to keep the soil moist.
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