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Description
Helianthemum Lunulatum, commonly known as Silver rockrose, is a small evergreen shrub that belongs to the family of Cistaceae. It is native to the Mediterranean region and grows up to a height of 30-40 cm. The plant produces striking silver-green foliage and beautiful yellow flowers with a dark center that bloom from late spring to early summer. The plant is drought-tolerant and can withstand harsh conditions, making it a popular choice for rock gardens and xeriscapes.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Malvales |
| Family | Cistaceae |
| Genus | Helianthemum |
Appearance
The Silver rockrose has attractive silver-green leaves that are small, oblong, and densely arranged. The leaves are covered with fine hairs that give the plant a velvety texture. The flowers are bright yellow, five-petaled, and have a dark center. They bloom in clusters from late spring to early summer and attract bees and butterflies. The plant has a bushy habit and can spread up to 30-60 cm, making it an excellent ground cover plant.
Care Guide
Helianthemum Lunulatum is an easy-to-grow plant that requires minimal care. Here are some guidelines to help you take care of your Silver rockrose:
Water
The plant is drought-tolerant and can survive long periods without water. Water the plant only when the soil is dry to the touch, and avoid overwatering, as it can lead to root rot.
Fertilization
The plant does not require frequent fertilization, but you can add a slow-release fertilizer in the spring to encourage healthy growth and blooming.
Soil
The plant prefers well-draining soil that is slightly acidic. Avoid heavy clay soils, as they can retain water and cause root rot.
Sunlight
The Silver rockrose thrives in full sunlight and requires at least six hours of direct sunlight a day. It can also tolerate partial shade, but it may affect blooming.
Hardiness Zones
The plant is hardy in USDA zones 8-11 and can tolerate temperatures as low as 10°F (-12°C).
Common Pests & Diseases
The Silver rockrose is a hardy plant that is not prone to many pests and diseases. However, here are some issues that you may encounter:
Pests
- Aphids
- Spider mites
- Whiteflies
Diseases
- Root rot
- Powdery mildew
- Botrytis
To prevent these issues, ensure that the plant is grown in well-draining soil and avoid overwatering. You can also use insecticidal soap or neem oil to control pests.
Habitat
Helianthemum Lunulatum is native to the Mediterranean region and can be found growing in rocky or sandy soils. The plant is adapted to dry and harsh conditions and can survive long periods without water.
Question and Answer
Q: Can I grow Helianthemum Lunulatum in a container?
A: Yes, the plant can be grown in a container. Ensure that the pot has drainage holes, and use well-draining soil.
Q: How often should I water the Silver rockrose?
A: Water the plant only when the soil is dry to the touch. Avoid overwatering, as it can cause root rot.
Q: Is Helianthemum Lunulatum deer-resistant?
A: Yes, the plant is deer-resistant, making it an excellent choice for gardens with deer problems.
Q: How often should I fertilize the plant?
A: You can add a slow-release fertilizer in the spring to encourage healthy growth and blooming. The plant does not require frequent fertilization.
Related Plants
- Helianthemum nummularium
- Helianthemum canum
- Helianthemum apenninum
- Helianthemum oelandicum
References
- “Helianthemum lunulatum.” Missouri Botanical Garden. Accessed September 9th, 2021. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=246898
- “Helianthemum lunulatum.” Plant Delights Nursery. Accessed September 9th, 2021. https://www.plantdelights.com/products/helianthemum-lunulatum
- “Helianthemum lunulatum.” Royal Horticultural Society. Accessed September 9th, 2021. https://www.rhs.org.uk/Plants/107647/Helianthemum-lunulatum/Details
