Phlox drummondii
Phlox drummondii is a half‑hardy annual native to Texas grown for bright, low mounds of spring and early summer color. Plants flower in a wide range of shades and often show a contrasting eye. It is best in full sun with afternoon shade in hot climates and needs regular moisture in well‑drained soil. Deadheading keeps flowers coming, and plants may revive for a lighter fall flush where summers cool. Compact size and nonstop bloom make it a reliable choice for containers and the front of borders.
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)
containers; bedding; edging; pollinators
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
Written by: Your Flowers Guide editorial team
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