Agastache urticifolia
nettle-leaved giant hyssop
A tall perennial up to 2m high, with square stems holding pairs of slightly glossy, strongly aromatic, lance-shaped to triangular green leaves with coarsely serrated edges. Short dense spikes of small pale pink, violet or white flowers are produced from mid to late summer
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Size
Ultimate height
1.5–2.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drained, Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Pink Purple White | Green | ||
| Autumn | Green | |||
| Winter |
Position
- Full sun
- Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H4Botanical details
- Family
- Lamiaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- 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
Correct
How to grow
Cultivation
Thrives in fertile, moist but well-drained soil in sun or light shade
Propagation
Propagate by seed or by division in spring
Suggested planting locations and garden types
- Architectural
- Cottage and informal garden
- Prairie planting
- Wildflower meadow
- Wildlife gardens
- Flower borders and beds
Pruning
Remove spent flowering spikes as they fade
Pests
Generally pest-free
Diseases
May be susceptible to powdery mildews
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