Species Slender Leopardbane
yellow flowers with dark-yellow center, green leaves and light-green stems

Slender Leopardbane

Arnica gracilis

Also Known As - Smallhead Arnica,Tall Mountain Arnica
Slender Leopardbane (Arnica gracilis) is a hardy perennial native to the Pacific Northwest. It is a mesic species that grows well in moist, partially shady environments. The flowerheads consist of showy, bright yellow ray florets held atop slender, leafy stalks. The foliage of Slender Leopardbane is a smooth, light green color that is covered in fine hairs. It generally has a clumping growth habit and can reach mature heights of up to two feet. This plant is a great choice for naturalizing moist garden areas or as part of a wildflower meadow.

Watering:

Minimal

Hardiness Zone:

Sun:

full sun,part shade

Leaf:

Yes

Leaf Color:

green

Growth Rate:

Low

Poisonous To Humans:

Yes

Poisonous To Pets:

Yes

Drought Tolerant:

Yes

Care Level:

Medium

watering

Narrowleaf Arnica should be watered regularly, but allowed to dry out slightly between watering. It should be watered approximately once a week during the growing season, which is typically mid-spring through late summer. During colder and dryer times, such as winter, it can be watered about every other week. When watering, you should saturate the soil until you can see moisture coming out of the drainage holes in the container. Let the soil dry out to about an inch or so before watering again. Avoid overwatering as this can cause root rot or other issues.

sunlight

Narrowleaf Arnica (Arnica angustifolia subsp. angustifolia) prefers full sunlight for most of the day. The amount of sunlight should range from 6-7 hours for optimal growth and flowering. Optimum sunlight should be between 10am-4pm for best results. When planting, it is important to make sure the area selected for Narrowleaf Arnica has consistent, direct sunlight. Shade in the afternoon and during the night is beneficial for the plant's growth, health, and flowering; however, too much shade or too much variation in light intensity should be avoided.

pruning

Narrowleaf Arnica typically does not require regular pruning. However, if dead or diseased stems and flowers are present, they can be removed as needed. Additionally, if the plant is becoming overgrown, it can be pinched back in spring before flowering occurs. This will help to promote branching and to keep the plant’s form and flowering in check. When pruning, always remove the stems as close to the ground as possible.

⚠️ Perenual and its members cannot be held liable for any health issues that may arise from the information provided on the website or from using any of the plants found on the site. The information provided is intended to be used as general guidelines only.