Agastache 'Rosie Posie'PBR
giant hyssop 'Rosie Posie'
An upright, clump-forming herbaceous perennial with aromatic, green leafy stems. Bright lavender-pink flowers appear from summer through to autumn. Deep purple calyxes which surround the flower bud remain for a longer period providing further colour interest
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Size
Ultimate height
0.5–1 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Pink | Green | ||
| Autumn | Pink | Green | ||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H3Botanical details
- Family
- Lamiaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Clump forming, Columnar upright
- Genus
Agastache are herbaceous perennials with simple, aromatic leaves and small 2-lipped tubular flowers in whorls forming dense spikes, in summer and autumn; some are rather tender but can be grown as annual bedding
- Name status
Accepted
How to grow
Cultivation
Grow in sharply drained, fertile soil in full sun
Propagation
Propagate by seed or division in spring
Suggested planting locations and garden types
- City and courtyard gardens
- Gravel garden
- Mediterranean climate plants
- Banks and slopes
- Flower borders and beds
Pruning
Remove spent flowering spikes throughout season. Do not cut back in the autumn if you wish to leave the seedheads for wildlife
Pests
Generally pest-free
Diseases
May be susceptible to powdery mildews
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.