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Herbaceous Perennial

Agastache 'Raspberry Summer'^PBR

giant hyssop 'Raspberry Summer'

A bushy, aromatic, short-lived herbaceous perennial 60cm high with ovate to lance-shaped dark green leaves, 4-6cm long, and spikes up to 30cm long of dark raspberry-pink flowers from midsummer to autumn.

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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

Loam

Sand

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

West–facing or South–facing

Exposure

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 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

Grow as an annual in colder areas, or as a perennial in warmer areas, in well-drained, fertile soil in full sun in a sheltered position, such as against a south-facing or west-facing wall

Propagation

Propagate by division in spring or by semi-ripe cuttings in early summer; it is a short-lived plant so propagate reserve plants each year; propagation for resale is prohibited without a licence

Suggested planting locations and garden types

Patio and container plants
City and courtyard gardens
Cottage and informal garden
Wall side borders
Flower borders and beds

Pruning

No pruning required but deadheading may prolong flowering

Pests

Generally pest-free

Diseases

Generally disease-free but may be susceptible to powdery mildews

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