Spiked speedwell has dense blue flower spikes above an upright clump of leaves, adding a vertical accent to summer borders.
- Height
- 60–92 cm / 2–3 ft
- Spread
- 60–77 cm / 2–2.5 ft
- Light
- Full sun
- Soil moisture
- Moist, well-drained
- Flowering
- Summer
- Foliage
- Deciduous
- Maintenance
- Low
- USDA zones
- 3a–8b
Planting
Choose full sun with moist, well-drained soil. Plant in groups within a perennial border or rock garden, where the flower spikes can rise above lower-growing neighbours.
Care
After the main flowering finishes, cut the stems down to the basal leaves. This tidies the clump and can encourage a second flowering in autumn.
Before planting: Persistently wet soil, especially in winter, can cause root rot.
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Sources & photo credit
Plant reference: NC State Extension Gardener Plant Toolbox. Content checked . Flowering seasons vary with local climate; USDA zones describe winter cold tolerance.
- Spiked speedwell: Cathy DeWitt · CC BY 4.0. Resized, converted to WebP and cropped for display.
- 'Butterfly Blue' pincushion: Cathy DeWitt · CC BY 4.0. Resized, converted to WebP and cropped for display.
- 'Dilys' geranium: Krzysztof Golik · CC BY-SA 4.0. Resized, converted to WebP and cropped for display.
- 'Fireball' hibiscus: Cathy DeWitt · CC BY 4.0. Resized, converted to WebP and cropped for display.