Androsace studiosorum

RHS Plant Profile

rock jasmine

RHS

Synonyms

Androsace primuloides hort.
Androsace sarmentosa var. yunnanensis misapplied
Androsace sarmentosa misapplied
Androsace primuloides
Androsace studiosorum

Alpine Rockery

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A mat-forming, evergreen perennial spreading by stolons. The rosettes are covered in silky hairs, and appear more silvery over winter. The flowers are a deep, rich pink with a small yellow eye, borne in generous clusters on red stems in spring

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: Up to 10 cm

Growing Conditions

Chalk Loam Sand

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Exposed or 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): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Primulaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Matforming
Genus: Androsace can be annuals, biennials or evergreen perennials forming mats or compact cushions, with salver-shaped flowers which may be solitary or in umbels
Name Status: Correct
Plant Range: Himalaya

How to Grow

Cultivation

Grow in a scree bed, in vertical crevices in rock or in moist but gritty, well-drained soil

Propagation

Propagate by seed sown in containers in an open cold frame as soon as ripe, or in autumn. Root single rosettes as cuttings in early to mid summer. Keep moist but water from below to avoid wetting the rosettes

Suggested planting locations and garden types

Patio and container plants
Rock garden
Gravel garden

Pruning

No pruning required

Pests

Generally pest-free. May be susceptible to aphids under glass

Diseases

Vulnerable to fungal disease in damp conditions. Remove dead rosettes to reduce the risk of infection