Contents
Description
Lithospermum is a genus of flowering plants in the Boraginaceae family. It is also known as gromwell, stoneseed, or puccoon. This perennial plant is native to North America, Asia, and Europe. It has around 75 species, and its name comes from the Greek words “lithos” which means stone and “spermum” which means seed. The plant is known for its small, bright yellow, or white flowers that bloom in clusters.
Taxonomic Information
| Domain | Eukarya |
|---|---|
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Boraginales |
| Family | Boraginaceae |
| Genus | Lithospermum |
Appearance
The Lithospermum plant has hairy, lance-shaped leaves that grow up to 8 inches long. The flowers are small, trumpet-shaped, and bloom in clusters. They are typically yellow or white, with five petals that spread out to form a star shape. The fruit of the plant is a nutlet that is covered in small prickles. The plant can grow up to 3 feet tall and prefers a full-sun to partial-shade location.
Care Guide
Water: Lithospermum plants prefer well-draining soil and should be watered regularly, especially during the growing season. It is important to avoid overwatering, as this can lead to root rot.
Fertilization: Fertilizer can be applied in the spring and summer to encourage growth and flowering. Use a balanced, all-purpose fertilizer at half strength.
Soil: Lithospermum plants prefer well-draining soil that is rich in organic matter. A pH of 6.0 to 7.0 is ideal.
Sunlight: Lithospermum plants prefer full sun to partial shade. They can tolerate some shade but may not flower as well.
Hardiness Zones: Lithospermum plants are hardy in USDA zones 5 to 9.
Common Pests & Diseases
Lithospermum plants are relatively pest and disease resistant. However, they may be susceptible to spider mites, aphids, and powdery mildew. To prevent these issues, avoid overcrowding and ensure good air circulation around the plant. If necessary, use insecticidal soap or neem oil to control pests.
Habitat
Lithospermum plants are native to North America, Asia, and Europe. They can be found in a variety of habitats, including meadows, prairies, and woodlands. In the wild, they often grow in rocky or sandy soil in open areas with plenty of sunlight.
Question and Answer
Q: How often should I water my Lithospermum plant?
A: Lithospermum plants prefer well-draining soil and should be watered regularly, especially during the growing season. It is important to avoid overwatering, as this can lead to root rot.
Q: What type of soil is best for Lithospermum plants?
A: Lithospermum plants prefer well-draining soil that is rich in organic matter. A pH of 6.0 to 7.0 is ideal.
Q: How tall can Lithospermum plants grow?
A: Lithospermum plants can grow up to 3 feet tall.
Q: What pests and diseases are common in Lithospermum plants?
A: Lithospermum plants are relatively pest and disease resistant. However, they may be susceptible to spider mites, aphids, and powdery mildew.
Related Plants
- Buglossoides arvensis
- Brunnera macrophylla
- Cryptantha
- Echium
References
- https://www.gardeningknowhow.com/ornamental/flowers/lithospermum/growing-lithospermum.htm
- https://www.fs.fed.us/wildflowers/plant-of-the-week/lithospermum_canescens.shtml
- https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=274468
