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Herbaceous Perennial

Agastache 'Cotton Candy'PBR
  • RHS Plants for pollinators

giant hyssop 'Cotton Candy'

A compact, bushy perennial to around 60cm high, with aromatic, lance-shaped green leaves with serrated edges. Dense spikes of tubular, pale pink flowers open from purple-tinted buds from mid summer into early autumn

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.5–1 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Pink Green
Autumn Pink Green
Winter
Position
  • Full sun
Aspect

South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H5
Botanical 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

Accepted

How to grow

Cultivation

Thrives in well-drained, fertile soil in full sun; some drought tolerance once established. Excellent drainage is especially important during the winter months

Propagation

Propagate by division in spring

Suggested planting locations and garden types
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • 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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