Lithodora diffusa 'White Star' (Gromwell)
Gromwell 'White Star'
A showstopper, Lithodora diffusa 'White Star' (Gromwell) is a low-growing evergreen shrub forming a neat, round cushion clothed in small, lance-shaped, glossy green, hairy leaves. In spring and summer, the shrub is covered with abundant, gleaming white star-shaped flowers outlined in vibrant blue. Compact and easy to grow, this plant is ideal for rock gardens, slopes, and cascading over retaining walls. A choice groundcover making an unforgettable display week after week.
- Grows up to 6-9 in. tall (15-22 cm) and 12-18 in. wide (30-45 cm).
- Easily grown in acidic, well-drained soils in full sun or partial shade. Full sun is best in cool summer climates, but some afternoon shade is appreciated in hot summer climates.
- Deer resistant
- Great for beds and borders, slopes, as a groundcover, cottage gardens, coastal gardens, city gardens, Mediterranean gardens, or gravel and rock gardens. Good choice for containers too.
- Virtually disease and pest free
- Trim back after flowering. Propagate by semi-hardwood cuttings
- Native to Southern and Western Europe.
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Requirements
| Hardiness | 6
– 9 |
|---|---|
| Heat Zones | 6
– 8 |
| Climate Zones | 5, 6, 7, 14, 15, 16, 17 |
| Plant Type | Shrubs |
| Plant Family | Lithodora - Gromwells |
| Exposure | Full Sun, Partial Sun |
| Season of Interest |
Spring (Late) Summer (Early,Mid,Late) |
| Height | 6" – 9" (15cm – 22cm) |
| Spread | 1' – 2' (30cm – 60cm) |
| Spacing | 12" – 18" (30cm – 45cm) |
| Water Needs | Average |
| Maintenance | Low |
| Soil Type | Loam, Sand |
| Soil pH | Acid, Neutral |
| Soil Drainage | Well-Drained |
| Characteristics | Showy, Evergreen |
| Tolerance | Deer |
| Attracts | Butterflies |
| Garden Uses | Banks and Slopes, Beds and Borders, Ground Covers, Patio and Containers |
| Garden Styles | City and Courtyard, Coastal Garden, Gravel and Rock Garden, Informal and Cottage, Mediterranean Garden |
Alternative Plants to Consider
Recommended Companion Plants
By Marbury, Shutterstock
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
Requirements
| Hardiness | 6
– 9 |
|---|---|
| Heat Zones | 6
– 8 |
| Climate Zones | 5, 6, 7, 14, 15, 16, 17 |
| Plant Type | Shrubs |
| Plant Family | Lithodora - Gromwells |
| Exposure | Full Sun, Partial Sun |
| Season of Interest |
Spring (Late) Summer (Early,Mid,Late) |
| Height | 6" – 9" (15cm – 22cm) |
| Spread | 1' – 2' (30cm – 60cm) |
| Spacing | 12" – 18" (30cm – 45cm) |
| Water Needs | Average |
| Maintenance | Low |
| Soil Type | Loam, Sand |
| Soil pH | Acid, Neutral |
| Soil Drainage | Well-Drained |
| Characteristics | Showy, Evergreen |
| Tolerance | Deer |
| Attracts | Butterflies |
| Garden Uses | Banks and Slopes, Beds and Borders, Ground Covers, Patio and Containers |
| Garden Styles | City and Courtyard, Coastal Garden, Gravel and Rock Garden, Informal and Cottage, Mediterranean Garden |
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