Hormathophylla spinosa 'Roseum'

RHS Plant Profile
spiny madwort 'Roseum'

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spiny madwort 'Roseum' RHS 2002
spiny madwort 'Roseum' visionspictures.com

Synonyms

Alyssum spinosum 'Roseum'
Ptilotrichum spinosum 'Roseum'

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'Roseum' is a compact, wiry sub-shrub to 30cm in height and width, with grey-hairy leaves and spine-tipped stems, and clear rose-pink flowers in small clusters at branch-tips

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
5–10 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun
Aspect
West–facing or East–facing or South–facing or North–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
Brassicaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
Hormathophylla can be annuals or evergreen perennials or sub-shrubs, with simple leaves and short racemes of small, 4-petalled yellow or white flowers in early summer
Name Status
Accepted

How to Grow

Cultivation

Suitable for rock garden, wall crevices or the front of a mixed border

Propagation

Propagate by seed and greenwood cuttings

Suggested planting locations and garden types

  • Rock garden
  • Gravel garden
  • Patio and container plants
  • Flower borders and beds

Pruning

Trim lightly after flowering to maintain compactness

Pests

May be susceptible to aphids and flea beetles

Diseases

May be susceptible to White blister and downy mildews