
Phlox subulata ‘Emerald Blue’
$9.99
Phlox subulata Emerald Cushion Blue covers low evergreen mats with lavender-blue flowers for rock gardens, edging, and patio pots.
- Description
- Additional information
Description
Phlox subulata Emerald Cushion Blue spreads a low evergreen mat that becomes covered with lavender-blue to purple flowers. The narrow green leaves keep the planting dense between bloom periods. Its prostrate growth fits rock gardens, edging, open ground, and the edges of patio containers. Mature mats stay near 6 inches tall and spread to about 2 feet.
Grow it in full sun or light partial shade for dense flowering. Keep the soil well drained and only lightly moist after establishment. Apply a light compost top-dressing in spring only when growth is weak. Shear the mat lightly just after flowering in late spring to encourage fresh growth. Root softwood cuttings in spring or detach rooted stem pieces in spring or early fall. Watch thinning areas for eelworms, leaf spot, or powdery mildew.
Additional information
| Height | 10 cm – 15 cm |
|---|---|
| Spread | 45 cm – 60 cm |
| Flowering months | April, May, June, March |
| Synonyms | Phlox (S) 'Emerald Cushion Blue', Phlox Emerald Cushion Blue, Phlox sub Emerald Cushion Blue, Phlox subulata 'Emerald Blue', PHLOX subulata 'Emerald Cushion Blue', Phlox Subulata Emerald Blue |
| Family | Polemoniaceae |
| Propagation | Root softwood cuttings of Phlox subulata Emerald Cushion Blue in spring, or detach rooted stem pieces in spring or early autumn. Keep new pieces lightly moist until established. |
| Pests | Phlox subulata Emerald Cushion Blue may be susceptible to leaf, bud, stem, or bulb eelworms. Check thinning patches if growth becomes weak or distorted. |
| Diseases | Phlox subulata Emerald Cushion Blue may suffer leaf spot or powdery mildew in crowded growth. Good drainage and airflow keep the mat cleaner. |
| Pruning | Shear Phlox subulata Emerald Cushion Blue lightly just after flowering in late spring. This keeps the mat dense and encourages fresh evergreen growth. |
| Hazardous | unknown |
| Variegated | no |
| Watering instructions | Keep soil well drained and only lightly moist once established. |
| Sunlight instructions | Grow in full sun or light partial shade for dense flowering. |
| Color flower spring | Purple, White, Blue |
| Color flower summer | Purple, White, Blue |
| Aspect | East, South, West |
| Foliage | Evergreen |
| Habit | Mat-former, Compact, Trailing |
| Moisture | Moist but Well Drained, Well Drained Soil |
| Ph | Acid, Alkaline, Neutral |
| Position | Full sun, Partial shade |
| Scent | No |
| Shape | Prostrate, Spreading |
| Suggest planting location | Banks and slopes, Patio and container use, Garden edging and borders, Rock and alpine gardens, Ground cover planting |
| Type | Perennial |
| Use for | Ground cover, Edging Plant, Container Planting |
| Years to max height | 2 |
| Drought resistance | yes |
| Cultivation | |
| Soil | Chalk, Loam, Sand |
| Local names | Emerald Cushion Blue Moss Phlox, Moss Phlox, Creeping Phlox |
| Blomidon Item No | MO23021617, ZPHLSUEB3.5PT |
| Usps | Lavender-blue flowers cover an evergreen green mat., Low ground cover for rock gardens, edging, and slopes. |


