Lithodora Crystal Blue (Gromwell)
Noted for its large flowers, Lithodora ‘Crystal Blue’ (Gromwell) is a vigorous, low-growing, evergreen shrub forming a mat of small, lance-shaped, dark green, hairy leaves. In spring and summer, the shrub is literally covered with abundant, sky-blue flowers, the largest of the genus. 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.
Noted for its large flowers, Lithodora 'Crystal Blue' (Gromwell) is a vigorous, low-growing, evergreen shrub forming a mat of small, lance-shaped, dark green, hairy leaves. In spring and summer, the shrub is literally covered with abundant, sky-blue flowers, the largest of the genus. 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 4-6 in. tall (10-15 cm) and 24-30 in. wide (60-75 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 and drought tolerant.
- 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
- Prune lightly in late summer by trimming the new tip shoots back by about half, to encourage a dense habit. Propagate by semi-hardwood cuttings
- Native to Southern and Western Europe.
Requirements
Hardiness | 6 – 9 |
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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 (Mid,Late)Summer (Early) |
Height | 4" – 6" (10cm – 15cm) |
Spread | 2' – 3' (60cm – 90cm) |
Spacing | 30″ (75cm) |
Water Needs | Average |
Maintenance | Low |
Soil Type | Loam, Sand |
Soil pH | Acid, Neutral |
Soil Drainage | Well-Drained |
Characteristics | Showy, Evergreen |
Tolerance | Deer, Drought |
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 |