Brilliant Blue Flowers
Produces vivid blue, funnel-shaped flowers that brighten garden borders and rockeries.
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Glandora diffusa, commonly known as purple gromwell or Lithodora, is a low-growing evergreen perennial valued for its vivid blue, funnel-shaped flowers and dense green foliage. It is suitable for rock gardens, borders, slopes, and containers. This spreading ornamental plant grows best in sunny locations with well-drained, slightly acidic to neutral soil.
Produces vivid blue, funnel-shaped flowers that brighten garden borders and rockeries.
Forms a dense mat of narrow green leaves that provides year-round foliage interest in suitable climates.
Develops a low, spreading habit suitable for slopes, edging, and selected ground-cover plantings.
Adds colorful blooms to rock gardens, gravel beds, and containers with appropriate drainage.
| Scientific Name | Glandora diffusa |
| Synonym | Lithodora diffusa |
| Common Name | Purple Gromwell; Lithodora |
| Plant Family | Boraginaceae |
| Plant Type | Flower; Evergreen Perennial Ground Cover |
| Flower Color | Blue, sometimes with violet tones depending on cultivar |
| Growth Habit | Low-growing, spreading, mat-forming subshrub |
| Foliage | Evergreen, narrow green leaves |
| Bloom Season | Late spring to early summer, depending on climate |
| Sunlight | Full sun; partial shade may suit warmer conditions |
| Soil Requirements | Well-drained, acidic to neutral soil; sandy or loamy soil is suitable |
| Watering | Moderate watering; avoid waterlogged soil |
| Planting Season | Spring or fall, depending on local climate and growing method |
| Germination Time | Species-specific timing should be confirmed with the seed supplier |
| Seed Starting | Follow supplier instructions for sowing depth, temperature, and any pretreatment |
| Mature Height | Approximately 4–12 inches, depending on growing conditions |
| Plant Spread | Approximately 18–36 inches, depending on cultivar and conditions |
| USDA Hardiness Zones | Often listed for Zones 6–9; verify suitability for the specific cultivar |
| Garden Uses | Rock gardens, borders, slopes, edging, and containers |
Diffusa Glandora adds vivid blue flowers and evergreen foliage to suitable garden spaces. Its spreading growth makes it an attractive choice for rock gardens, borders, and slopes. Provide well-drained soil, suitable sunlight, and appropriate moisture for healthy growth.
Discover useful information about Diffusa Glandora Seeds, ground-cover growth, and flower care.
Yes. Lithodora diffusa is a botanical synonym of the currently accepted name Glandora diffusa. The plant is commonly called purple gromwell and is known for its vivid blue flowers and low, spreading growth habit.
Yes. Glandora diffusa forms a low, spreading mat of evergreen foliage and can be used around borders, on suitable slopes, and in rock gardens. Plant it in well-drained soil and allow enough room for its mature spread.
Glandora diffusa grows best in well-drained soil because prolonged waterlogging can damage its roots. Sandy or loamy soil with an acidic to neutral pH is generally suitable. Water consistently while plants establish, but avoid keeping the soil saturated.