in bloom
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Phlox drummondii
Half‑hardy annual
At‑a‑glance
- Group/Class: Half‑hardy annual
- Height × spread: 6–12 in (15–30 cm) × 6–12 in (15–30 cm)
- Bloom window: May to July
- Color & flower form: Clusters of five‑lobed, trumpet‑shaped flowers in many colors
- Fragrance: 1 trace
- USDA hardiness: grown as annual across North America
- Breeder / Year / Origin: unknown; native to Texas
- Pet safety: unknown
How it differs
- Grown as an annual rather than a perennial clump.
- Lower, compact habit suited to edging and containers.
- Longest bloom in cool summers; declines in peak heat.
- Color range broader than most native perennials.
Strengths
- Quick to flower from seed.
- Abundant color at low height.
- Attracts butterflies and hummingbirds.
- Useful for filling gaps and seasonal displays.
Care in one minute
Sow or plant after frost in full sun; provide afternoon shade where summers are hot.
Grow in loose, fertile, well‑drained soil and water consistently.
Pinch young plants to promote branching.
Deadhead to extend bloom and limit reseeding where not desired.
Watch‑outs
- Powdery mildew in humid weather.
- Crown rot in poorly drained soil.
- Spider mites may occur in heat and drought.
Best uses (tags)
Provenance note
The species honors Scottish collector Thomas Drummond, who sent Texas seed to Europe in the 1830s.
References
- Missouri Botanical Garden – Phlox drummondii
- Lady Bird Johnson Wildflower Center – Phlox drummondii
- RHS – How to grow annual phlox
