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Herbaceous Perennial

Strobilanthes pentastemonoides var. dalhousieana

An evergreen, bushy perennial to 1.2m tall and spreading via prostrate, rooting stems to 1.5m wide with ovate, dark green, serrated leaves to 13cm long . Tubular flowers borne in small clusters in summer are shades of blue, pale purple and pink

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Ultimate height

1–1.5 metres

Time to ultimate height

5–10 years

Ultimate spread

1.5–2.5 metres

Loam

Sand

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

South–facing or West–facing or East–facing

Exposure

Sheltered

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: Acanthaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Bushy, Spreading branched
Genus: Strobilanthes can be evergreen or herbaceous perennials or subshrubs with simple, opposite leaves and spikes, cone-like clusters or loose panicles of tubular or funnel-shaped flowers
Name status: Correct
Plant range: W Himalaya, Bangladesh

How to grow

Cultivation

Grow under glass in peat-free, loam-based compost in full light with shade from hot sun. Grow outdoors in light free draining soil in full sun to partial shade in a frost-free area

Propagation

Propagate by seed or softwood cuttings

Suggested planting locations and garden types

Cottage and informal garden
Low Maintenance
Flower borders and beds
Wall side borders

Pruning

If required can be cut back to limit height and spread

Pests

May be susceptible to glasshouse red spider mite

Diseases

Generally disease-free

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