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Herbaceous PerennialSynonym

Agastache 'Kudos Silver Blue' (Kudos Series)

giant hyssop [Kudos Silver Blue]

A compact and bushy, upright herbaceous perennial with aromatic, dark green, oval to lance-shaped leaves and long whorled spikes of tubular two-lipped pale violet-blue flowers which are very attractive to pollinators all through summer to autumn

Synonyms

Agastache 'Kudos Sb'^PBR
Agastache 'Kudos Silver Blue' (Kudos Series)

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Clay

Loam

Sand

Moisture

Well–drained, Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

East–facing or South–facing or West–facing

Exposure

Exposed or Sheltered

Drought resistance

Yes

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

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: Trade

How to grow

Cultivation

Will grow well in well-drained soil preferably in full sun, with shelter. Some drought tolerance once established

Propagation

Propagate by seed or by division in spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Patio and container plants
Low Maintenance
Flower borders and beds

Pruning

Deadhead throughout the season to encourage more flowers

Pests

Generally pest-free

Diseases

May be susceptible to Powdery mildews

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