Dahlia Happy Single Princess ('HS Princess'PBR) (Happy Single Series) (Sin)
dahlia [Happy Single Princess]
A compact herbaceous perennial, to 80cm high, with leaves so dark they are almost black. Single flowers, 5cm across, with eight white rays, tinged with pink, and a golden yellow central disc, in summer and autumn
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Size
Ultimate height
0.5–1 metresTime to ultimate height
1–2 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Black Green | |||
|---|---|---|---|---|
| Summer | White Pink Yellow | Black Green | ||
| Autumn | White Pink Yellow | Black Green | ||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H3Botanical details
- Family
- Asteraceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- Genus
Dahlia are tuberous rooted perennials with pinnately divided leaves and showy flowerheads, double in many cultivars, in summer and autumn
- Name status
Trade
- Horticultural Group
- Single-flowered dahlias have flowerheads usually less than 10cm across, with one or two rows of spreading ray florets, surrounding a central boss of small tubular disc florets which are valuable for bees and butterflies
How to grow
Cultivation
Grow in fertile, humus-rich, well-drained soil, enriched with organic matter, in full sun; lift and store tubers in autumn to replant or use as a source of cuttings in spring; poor flowering may be caused by overfeeding with high nitrogen fertilisers, not enough direct sunshine or not enough moisture at the roots; for more advice, see dahlia cultivation
Propagation
Propagate by softwood cuttings taken in spring from shoots from stored tubers, or divide the tubers, ensuring that each division has a viable bud
Suggested planting locations and garden types
- City and courtyard gardens
- Cottage and informal garden
- Patio and container plants
- Wildlife gardens
- Cut flowers
- Flower borders and beds
- Bedding
Pruning
Deadhead to prolong flowering; cut back to near ground level in the autumn, before lifting and storing for the winter
Pests
May be susceptible to aphids, capsid bug, earwigs, caterpillars, slugs and glasshouse red spider mite
Diseases
May be affected by powdery mildews, dahlia mosaic virus, cucumber mosaic virus, tomato spotted wilt virus, storage rots, and leafy gall
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.