Draba longisiliqua

RHS Plant Profile
long-podded whitlow grass

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A cushion-forming evergreen perennial to 8cm in height, with dense rosettes of grey-hairy, obovate leaves and bright yellow flowers 10mm across borne in short racemes on slender stems just above the foliage

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
5–10 years
Max Spread
0.1-0.5 metres
Max Height
Up to 10 cm

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or East–facing
Exposure
Exposed
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
Brassicaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Matforming
Genus
Draba can be annuals or evergreen perennials, with rosettes of small leaves forming compact cushions or mats, and short racemes of small, 4-petalled flowers in spring or early summer
Name Status
Correct
Plant Range
Caucasus

How to Grow

Cultivation

Grow in gritty, moist but very well-drained soil in full sun. Protect from winter wet and water carefully to avoid wetting the foliage. Usually grown in rock garden or scree, or in pots in an alpine house

Propagation

Propagate by seed sown in an open frame in autumn; they need exposure to cold to germinate. Propagate by rooting rosettes in late spring

Suggested planting locations and garden types

  • Patio and container plants
  • Rock garden
  • Gravel garden

Pruning

No pruning required

Pests

May be susceptible to aphids and glasshouse red spider mite when grown under glass

Diseases

Generally disease-free