Echinacea angustifolia
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Echinacea angustifolia

Echinacea Angustifolia

Photo · (c) Elaine White, some rights reserved (CC BY-NC), uploaded by Elaine White COURTESY INATURALIST
ON THIS PLANT

Echinacea angustifolia, the narrow-leaved purple coneflower or blacksamson echinacea, is a species of flowering plant in the family Asteraceae. It is native to North America, where it is widespread across much of the Great Plains of central Canada and the central United States, with additional populations in surrounding regions.E. angustifolia is a perennial herb with spindle-shaped taproots that are often branched. The stems and leaves are moderately to densely hairy. The plant produces one flower heads one branch - each at the end of a long peduncle. Each flower head contains 8–21 pink or purple ray florets plus 80–250 orange disc florets.Echinacea angustifolia blooms in late spring to mid-summer. It is found growing in dry prairies and barrens with rocky to sandy-clay soils. There are two subspecies: Echinacea angustifolia subsp. angustifolia is native to central Canada and the central United States from Saskatchewan and Manitoba in the north to Arizona, New Mexico, Texas, and Louisiana in the south. Echinacea angustifolia subsp. strigosa has a more limited range in Kansas, Oklahoma, Texas, and Louisiana.Many Native American groups used this plant for traditional medicine, although there is mixed consensus that it is effective or safe for treating disease.

A note from PlantMom

Blacksamson echinacea shows strong resistance to disease and is generally not very susceptible to illnesses. Still, it can be affected by pests and diseases present in its environment. Such infections are typically mild. Regarding care, this plant needs a moderate amount of attention. It should be pruned on a regular basis to preserve a neat appearance and support healthy growth. Applying fertilizer can also encourage flowering. Blacksamson echinacea is appropriate for anyone who has an outdoor area, like a garden or patio, and does not demand extensive gardening experience. It may need extra care if cultivated indoors.

— PlantMom
CARE GUIDE

How to keep Echinacea Angustifolia.

Light

Blacksamson echinacea grows best with abundant light but can cope with moderate illumination. In its native habitats it usually gets plentiful light, which aids its growth. Too much or too little light can impair its health, resulting in stunted growth or changes in color.

Water

Blacksamson echinacea, native to the North American prairies, thrives in well-drained soils and is drought-tolerant thanks to its deep taproot. For optimal growth, it needs to be watered weekly. While it can endure cooler temperatures, its irrigation requirements decrease significantly outside the growing season.

Temperature

Blacksamson echinacea is naturally suited to temperate climates and prefers temperatures from 32 to 90 °F (0 to 32 °C). In hotter conditions it needs extra shade or more frequent watering to do well. In cooler months, the plant can withstand temperatures close to freezing with little or no adjustment.

Fertilizer

The best time to fertilize a Blacksamson echinacea is in early spring, as it comes out of dormancy and starts active growth. Fertilization supplies important nutrients for healthy development. Although Blacksamson echinacea has fairly low fertilizer requirements, applying fertilizer annually can improve its survival and encourage better, longer-lasting flowers.

Pruning

Blacksamson echinacea is a plant with narrow leaves and vibrant purple flowers. To encourage growth, it is best to prune it in early to late spring and cut back any dead stems. After the plant flowers, remove the spent blooms to promote additional blooms. Regular pruning helps improve air circulation, reduces the risk of disease, and enhances the plant's overall vitality.

Pot & Repot

To promote growth, repot blacksamson echinacea every 2-3 years in the spring. Choose a pot that is 2 inches wider to allow for root expansion. After repotting, place the plant in indirect sunlight and keep the soil consistently moist to aid its recovery and ensure it thrives.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Perennial
Genus
Echinacea
Family
Asteraceae
Hardiness Zone
3-8
Mature Height
40 cm to 61 cm
Mature Spread
25 cm to 46 cm
Leaf Color
Green, Blue
Leaf Type
Deciduous
Flower Color
Pink, Purple, White, Brown, Orange
Flower Size
6.35 cm
Bloom Time
Summer
Planting Time
Autumn
Harvest Time
Late summer, Early fall, Mid fall
ALSO KNOWN AS

Other names.

en Purple coneflower en Black-sampson echinacea en Narrow-leaf echinacea en Narrow-leaf purple-coneflower en Kansas snakeroot en Echinacea en Black sampson en Narrow-leaf-coneflower en Narrowleaf purple coneflower en Mo'ôhtávêheséeo'ôtse en Blacksamson echinacea en Blacksamson en Narrow-leaved purple coneflower en Narrow-leaved purple cone-flower en Black-samson echinacea en Prairie purple coneflower en Echinacea Panama Red en Coneflower ar سرخارگل،
FREQUENTLY ASKED

Reader questions.

How should I water my Blacksamson echinacea plant?

To properly water the Blacksamson echinacea, follow these guidelines for best results. Firstly, use filtered water at room temperature as tap water might have harmful particles. This is important because the plant comes from a warm environment and cold water can shock its system. Additionally, avoid overhead watering as it can lead to foliage issues. Instead, apply filtered room temperature water directly to the soil until it is thoroughly soaked. This benefits the plant by moistening the roots and aiding their spread through the soil to gather necessary nutrients.

Why should I put fertilizer on my Blacksamson echinacea?

Fertilization is important for the Blacksamson echinacea because it provides essential nutrients for the plant's growth. While the overall fertilization needs for this plant are relatively low, annual fertilization can greatly benefit its survival and enhance the quality and longevity of its flowers. Therefore, those who want their Blacksamson echinacea to flourish should prioritize regular fertilization.

What are the sunlight requirements for Blacksamson echinacea?

Blacksamson echinacea, or Echinacea angustifolia, thrives best when it receives full sun, which is defined as above 6 hours of sunlight daily. However, it can also manage in partial sun, receiving about 3-6 hours of sunlight. Observing how sunlight moves through your garden and selecting spots that offer a balance of light and shade will ensure the best conditions for your plant's growth. Adequate sunlight is essential, as too much or too little can lead to issues such as stunted growth or changes in color.

What are the essential growing conditions for Blacksamson echinacea?

Blacksamson echinacea, or Echinacea angustifolia, is well-suited to temperate climates and prefers temperatures ranging from 32 to 90°F (0 to 32°C). To ensure its health in higher temperatures above this range, the plant may require additional shade or watering. Conversely, it exhibits strong cold resistance and can typically survive near-freezing temperatures without special accommodations. Despite this resilience, if winter temperatures are expected to drop below -35°C, protective measures should be taken, such as covering the plant with soil or straw. Additionally, it is beneficial to water the plant abundantly before the first freeze of autumn to maintain soil moisture through the colder months, aiding in winter and early spring survival.

What do I do if I give my Blacksamson echinacea plant too much or too little water?

Overwatering is a common issue for Blacksamson echinacea and can have negative effects on its health. When this plant receives too much water, its stems and leaves may wilt and turn yellow. Over time, overwatering can lead to diseases like root rot, mold, and mildew, which can be fatal for the plant. Underwatering, on the other hand, is less common for Blacksamson echinacea due to its decent drought tolerance. However, it can still happen, and when it does, the plant's leaves may become brittle and brown. To care for your Blacksamson echinacea, it is crucial to notice the signs of overwatering early on. Some diseases caused by overwatering, like root rot, may not be fixable if you wait too long. If you see early signs of overwatering, reduce your watering schedule immediately. Also, check the quality of the soil. If it drains poorly, replace it with a loose, well-draining potting mix. If you notice signs of underwatering, simply water more regularly until the plant recovers.

When should I fertilize my Blacksamson echinacea for the best results?

The best time to fertilize a Blacksamson echinacea is in late winter to early spring. During this time, the plant is transitioning from dormancy to active growth, and fertilization at this time promotes healthy growth for the season. It is also possible to fertilize the plant in the fall, but it is not recommended to feed it during summer or winter.

How can artificial lighting be used for Blacksamson echinacea?

For indoor Blacksamson echinacea plants or those in areas with insufficient natural sunlight, especially during winter or in less sunny spaces, artificial lighting is a crucial solution. LED lights are recommended due to their ability to provide specific wavelengths of light needed by plants. Full sun plants require 30-50W/sq ft, partial sun plants need 20-30W/sq ft, and full shade plants should receive 10-20W/sq ft of artificial light. The light source should be placed 12-36 inches above the plant to mimic natural sunlight, with a duration of 8-12 hours of light per day to foster optimal growth.

What should be done if Blacksamson echinacea experiences extremely low temperatures?

Blacksamson echinacea thrives best in temperatures above 0°C and should ideally not be exposed to conditions below -30°C. Exposure to temperatures below -35°C may not show immediate damage but can result in decreased or absent sprouting in the following spring. If after an unusually harsh winter the plant fails to sprout, it's recommended to remove any parts of the plant that show no signs of life. Taking these steps can help ensure the plant's health and vitality for the upcoming growing season.

How frequently should I water my Blacksamson echinacea?

If your Blacksamson echinacea plant is in a pot, the easiest way to determine if it needs water is by sticking your finger into the soil. If the top two to three inches of soil are dry, it's time to water it. If you grow your Blacksamson echinacea outdoors in the ground, you can use a similar method to check the soil. Once the top few inches have dried out, it's time to water. Generally, in the spring and early fall, watering once a week is sufficient. However, during hot weather, you may need to water twice or more per week. It's worth noting that mature, well-established Blacksamson echinacea plants have a great ability to withstand drought.

When should I not put fertilizer on my Blacksamson echinacea plant?

To properly care for your Blacksamson echinacea, it is recommended to only fertilize it during the late winter and early spring. This plant doesn't require frequent fertilization, so a single annual feeding is enough. Overfertilizing during the spring, summer, and fall can cause complications, unless you missed fertilizing in the spring, which then permits feeding in the fall. Additionally, there is no need to fertilize this plant during the winter when it is in a dormant growth phase and not producing new growth.

What are the symptoms of inadequate lighting for Blacksamson echinacea?

Black samson echinacea exhibits several symptoms when subjected to inadequate lighting, including smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, and lighter-colored new leaves indicating low chlorophyll and nutrient levels. Additionally, excessive sunlight can cause chlorosis, sunscald, leaf curling, wilting, and leaf scorching, highlighting the importance of balanced light exposure.

How should Blacksamson echinacea be cared for during high temperature periods?

During the summer months, when temperatures climb above its preferred range, Blacksamson echinacea requires special attention to prevent heat stress. If temperatures exceed 32°C, the plant's leaves may lighten, curl, become prone to sunburn, and, in severe cases, the plant may wilt and dry out entirely. To combat these symptoms, it's advisable to trim away any sunburned or dried parts of the plant. Providing shade during the midday and afternoon sun, either by relocating the plant or using a shade cloth, can also be beneficial. Additionally, watering the plant in the morning and evening helps keep the soil moist and supports the plant's overall well-being during hot weather.

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