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Herbaceous Perennial

Agastache 'Firebird'
  • RHS Plants for pollinators

giant hyssop 'Firebird'

An upright perennial to 75cm, with grey-green, mint-scented leaves and dense spikes of tubular, soft orange flowers in summer

Synonyms
Agastache barberi 'Firebird'

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green Grey Silver
Summer Orange Green Grey Silver
Autumn Green Grey Silver
Winter
Position
  • Full sun
Aspect

West–facing or South–facing

Exposure
Exposed or Sheltered
Hardiness
H2
Botanical details
Family
Lamiaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Bushy
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

Can be used as a gap-filler in herb gardens or in sunny, dry places, for example at the base of walls. Grows best in well-drained alkaline soil but will tolerate poor acid soils. Tends to be short-lived

Propagation

Propagate by seed

Suggested planting locations and garden types
  • Cottage and informal garden
  • Gravel garden
  • Mediterranean climate plants
  • Flower borders and beds
  • Banks and slopes
Pruning

Remove spent flowering spikes

Pests

Generally pest-free

Diseases

Generally disease-free

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