Long-flowered Spur-valerian (Centranthus longiflorus) is a charming perennial with fragrant pink to red flowers in summer. It thrives in well-drained soil and full sun.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers at least 6 hours of direct sunlight daily for best flowering.
Moderate
50% intensity
Allow soil to dry slightly between waterings. Reduce in winter.
Well-drained
50% intensity
Moderate
50% intensity
Prefers temperatures between 15-25°C. Tolerates cooler temperatures in winter.
Low
25% intensity
Fertilize sparingly in spring. Avoid over-fertilizing.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly during the growing season, allowing the soil to dry slightly between waterings. Reduce watering in winter.
Centranthus longiflorus prefers well-drained soil and is moderately drought-tolerant once established. Avoid waterlogged conditions which can lead to root rot.
Deadhead spent flower spikes to encourage reblooming and maintain a tidy appearance. Cut back plants in late fall or early spring to remove dead or damaged growth.
This also helps maintain a compact shape and promotes vigorous new growth.
Propagate by seed sown in spring or by stem cuttings taken in late spring or early summer. Seeds germinate best with stratification. Cuttings root readily in well-draining compost.
Division of established clumps can also be done in early spring.
Repot young plants annually or as needed in spring, moving them to a slightly larger pot with fresh, well-draining potting mix. Mature plants in the ground generally do not require frequent repotting and prefer to be slightly root-bound, which can encourage flowering.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Long-Flowered Spur-Valerian (Centranthus longiflorus)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Dipsacales |
| Family | Caprifoliaceae |
| Genus | Centranthus |
| Species | Centranthus longiflorus |
Similar in genus Centranthus
Answers based on plant encyclopedia data
