Origin
Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins, commonly known as Hairy Rockcress, is a perennial plant species belonging to the Brassicaceae family. It is native to North America, found in the central and eastern United States and parts of Canada.Common names
The plant has several common names, including Hairy Rockcress, Rock Cress, Smooth Rock Cress, and Cream Flax.Uses
The plant has a variety of uses. Hairy Rockcress is often used as an ornamental plant in gardens due to its attractive flowers. It is also utilized for erosion control in areas with disturbed soil. Additionally, the plant's leaves are occasionally consumed as a potherb.General appearance
Hairy Rockcress typically grows to be around 10 to 30 centimeters in height with an erect, unbranched stem. The leaves of this plant are oblong in shape and have a hairy texture, giving the plant its common name. The plant features small, white flowers that grow in racemes atop the stems. The flowers have four petals and are around 5 millimeters in diameter. The fruit of this plant is a long, slender capsule containing small, round seeds. Overall, Hairy Rockcress has a delicate and attractive appearance that makes it a popular choice for gardeners.Growth Conditions for Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins
Light: Arabis hirsuta var. adpressipilis prefers full sun to partial shade. It grows best in areas with at least 6 hours of direct sunlight per day. However, it can tolerate some shade, particularly in hotter climates. In areas with intense sunlight, some shade during the hottest part of the day can be beneficial.
Temperature: Arabis hirsuta var. adpressipilis can tolerate a wide range of temperatures, although it prefers cooler temperatures. It grows well in USDA hardiness zones 3-8, which have average minimum temperatures ranging from -40°F (-40°C) to 20°F (-6.7°C). It can tolerate temperatures as high as 85°F (29.4°C), although prolonged exposure to high temperatures can cause wilting and other stress symptoms.
Soil: Arabis hirsuta var. adpressipilis prefers well-draining soils that are rich in organic matter. It can tolerate a range of soil pH levels but prefers neutral to slightly acidic soils with a pH of 6.0-7.0. It does not tolerate heavy clay soils, which can become waterlogged and suffocate the roots. A sandy loam or loam soil with good drainage is ideal for growth.
Cultivation
Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins grows well in a variety of soil types. However, it thrives in well-draining soil with a pH range between 6.0 and 7.5. This plant variety prefers full sunlight, but it can tolerate partial shade.
To ensure the best growth, plant Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins in the spring. This allows the plant to establish its roots before the hot summer months.
Watering Needs
Consistent moisture is key to the growth and survival of Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins. Water the plant regularly, preferably once a week. The frequency may increase during hot and dry weather, but avoid overwatering, as this can lead to root rot and other fungal diseases.
Fertilization
Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins does not require much fertilizer. You can apply a slow-release, balanced fertilizer at the start of the growing season. Alternatively, you can top-dress the soil with compost or organic matter to provide the necessary nutrients.
Pruning
Pruning is not a requirement for Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins; however, it is beneficial to cut back the plant after flowering to promote bushier growth and remove any dead or damaged foliage.
Propagation of Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins
Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins can be propagated by seeds or vegetatively.
Propagation by Seeds
The seeds of Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins can be sown directly into the soil during the spring or fall seasons. Before sowing, prepare the soil by tilling and removing any weeds. Then, broadcast the seeds and cover them lightly with soil. Keep the soil moist by watering regularly until the seedlings emerge, which usually takes about two weeks. Thin the seedlings to a spacing of 6 to 10 inches apart to allow ample room for growth.
Vegetative Propagation
The vegetative propagation of Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins can be done by stem cuttings or division. For stem cuttings, select healthy stems and cut them into 4 to 6 inch pieces. Remove the lower leaves and dip the cut end in rooting hormone. Plant the cuttings in well-draining soil and keep the soil moist until the roots develop. For division, dig up a mature plant and separate the root ball into several sections. Replant the sections in well-draining soil and water them regularly until they establish.
Disease Management
Arabis hirsuta var. adpressipilis, like any plant, may suffer from a range of diseases that can affect its health and productivity. Some of the common diseases that may affect this plant include powdery mildew, rust, and fungal leaf spots. Here are some ways to manage these diseases and keep your Arabis hirsuta var. adpressipilis healthy:
- Powdery Mildew Management: This disease happens due to high humidity and poor air circulation. To manage this disease, avoid over-watering and provide proper ventilation. Another way to prevent powdery mildew is by cleaning up fallen plant debris and use fungicide spray when necessary.
- Rust Management: Rust is another fungal disease that likes damp conditions. To prevent rust, keep the plant dry by avoiding overhead watering. If necessary, apply a fungicide spray to prevent the spread of the disease.
- Fungal Leaf Spot Management: Leaf spots are caused by bacteria and can cause discoloration of leaves. Avoid overhead watering and provide proper drainage to prevent the growth of fungal infections. Fungicide spray may help to manage leaf spot infections.
Pest Management
Arabis hirsuta var. adpressipilis can also be affected by pests. Some common pests affecting the plant are aphids, whiteflies, and spider mites. Here are some ways to manage these pests:
- Aphid Management: These pests can be managed by washing plants with a strong spray of water to knock them off the plant. You can also apply insecticidal soap or neem oil to control the population.
- Whitefly Management: Whiteflies can be controlled by placing sticky traps or yellow cards near the plant. You can also use insecticidal soap or neem oil to control the pest population. Clean the area surrounding the plant regularly to reduce the chances of pest infestation.
- Spider Mite Management: Spider mites can be managed by washing the plant frequently with water. You can also use insecticidal soap or neem oil to control infestations. Ensure proper air circulation and avoid over-watering as spider mites thrive in hot, dry environments.
