Phlox subulata
Cushion Phlox
Common names: Mat Phlox, Moss Phlox
Photo: UpstateNYer · CC BY-SA 3.0 · Source
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Description
The cushion phlox (Phlox subulata) forms dense, evergreen cushions that transform into a bright carpet of flowers in early spring. From early April to late May (week 14 to 21) it covers wall crowns, rock gardens, and garden edges with countless small blooms in white, pink, violet, or purple. The ‘Emerald Cushion Blue’ variety displays a rich lavender‑blue and remains pleasantly compact. Outside the flowering period, its fine, needle‑like foliage provides year‑round green cover.
Care instructions
Plant in full sun on well‑drained, slightly sandy or loamy soil; it does not tolerate waterlogging. After flowering in May, trim back about one‑third to keep cushions dense and encourage branching. In prolonged summer droughts, occasional watering is appreciated, but the plant otherwise tolerates low moisture well. Every three to four years, divide the cushions to rejuvenate growth and produce new plants for other beds. No winter protection is needed, but avoid heavy, wet soils during cold months.
Soil & site
Soil pH
Soil type
well-drained, lean, sandy, lime-loving
Feeding
Light feeder
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