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Description
Geranium Rozanne Gerwat, also known as Rozanne Cranesbill or simply Rozanne, is a perennial flowering plant belonging to the Geranium genus. It is a hybrid of two different species, Geranium himalayense and Geranium wallichianum, and was first introduced in the 2000s by a British plant breeder named Donald Waterer. Since then, it has gained immense popularity among gardeners worldwide due to its beautiful blue-violet flowers and long blooming period.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Geraniales |
| Family | Geraniaceae |
| Genus | Geranium |
Appearance
The Geranium Rozanne Gerwat plant typically grows up to 20-30 inches in height and spreads out to about 24-36 inches in width. It has a bushy habit with deeply divided, green foliage that turns reddish-brown in the fall. The plant produces large, saucer-shaped, blue-violet flowers with white centers that are about 2-3 inches in diameter. The flowers bloom profusely from late spring to early fall and attract bees, butterflies, and other pollinators. The plant also produces fruit in the form of a beaked capsule that contains several small seeds.
Care Guide
Geranium Rozanne Gerwat is a relatively easy plant to care for and can thrive in a variety of growing conditions. Here are some tips for taking care of this plant:
Water
Water the plant regularly but avoid overwatering, as this can lead to root rot. The soil should be moist but not waterlogged. It’s best to water the plant in the morning or evening, avoiding the hottest part of the day.
Fertilization
Fertilize the plant once a month during the growing season (spring and summer) with a balanced fertilizer. Avoid fertilizing the plant during the fall and winter.
Soil
The plant prefers well-draining soil that is rich in organic matter. A pH level of 6.0-7.5 is ideal.
Sunlight
The plant thrives in full sun to partial shade. It can tolerate some shade, but the flowers may not be as profuse or vibrant.
Hardiness Zones
The plant is hardy in USDA zones 5-8. It can tolerate some frost but may not survive in extremely cold temperatures.
Common Pests & Diseases
Geranium Rozanne Gerwat is generally resistant to most pests and diseases. However, here are some common issues to look out for:
Pests
- Aphids
- Spider mites
- Whiteflies
Diseases
- Botrytis blight
- Crown rot
- Leaf spot
Prevent these issues by ensuring proper plant care and hygiene, including regular watering, fertilization, and pruning. Remove any infected plant material immediately to prevent the spread of disease.
Habitat
Geranium Rozanne Gerwat is native to the Himalayas, but it can now be found growing in gardens and landscapes worldwide. It thrives in well-draining soil and can tolerate a range of temperatures and growing conditions.
Questions and Answers
Q: How long does the Geranium Rozanne Gerwat plant flower for?
A: The plant flowers profusely from late spring to early fall.
Q: Can the Geranium Rozanne Gerwat plant tolerate shade?
A: Yes, the plant can tolerate some shade, but the flowers may not be as profuse or vibrant.
Q: What is the ideal pH level for the soil for Geranium Rozanne Gerwat?
A: The ideal pH level for the soil is 6.0-7.5.
Q: What are some common pests and diseases that affect Geranium Rozanne Gerwat?
A: Common pests include aphids, spider mites, and whiteflies, while common diseases include botrytis blight, crown rot, and leaf spot.
Related Plants
- Geranium ‘Johnson’s Blue’
- Geranium x cantabrigiense
- Geranium macrorrhizum
- Geranium sanguineum
References
- “Geranium Rozanne.” Royal Horticultural Society, rhs.org.uk/plants/112669/Geranium-Rozanne/Details.
- “Geranium Rozanne (‘Gerwat’).” Missouri Botanical Garden, missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b990.
- “Geranium Rozanne.” Gardenia, gardenia.net/plant/geranium-rozanne.
