Malva trimestris 'Silver Cup'

RHS Plant Profile
tree mallow 'Silver Cup'

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tree mallow 'Silver Cup' RHS 1996

Synonyms

Lavatera trimestris 'Silver Cup'

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Annual Biennial
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An annual to 70cm, with rounded leaves and open funnel-shaped light pink flowers 7-10cm across, prominently veined with deep red-purple towards the centre

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

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

Position

Full sun
Aspect
South–facing or West–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)
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Malvaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Malva can be annuals, biennials or perennials, with rounded, often palmately lobed leaves and 5-petalled, open funnel-shaped flowers in the leaf axils or in terminal racemes
Name Status
Accepted

How to Grow

Cultivation

Grow in a moderately fertile, well-drained soil in full sun, shelter from drying winds

Propagation

Propagate by seed sown in-situ or in pots in late spring

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Coastal
  • Patio and container plants
  • Wildlife gardens
  • Flower borders and beds

Pruning

Remove after flowering

Pests

Generally pest-free

Diseases

May be susceptible to a rust