Sphaeralcea incana

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<em>Sphaeralcea</em> <em>incana</em> RHS
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Herbaceous Perennial
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A bushy perennial to 60cm high, with a woody crown and upright stems bearing triangular, shallowly lobed, downy grey-green leaves. Saucer-shaped orange flowers are produced in summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Malvaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy, Columnar upright
Genus
Sphaeralcea may be annuals, perennials, shrubs or sub-shrubs, with downy leaves and stems. Mallow-like flowers, in a wide range of colours, are produced singly or in sprays from summer to autumn
Name Status
Correct

How to Grow

Cultivation

Grow in moderately fertile, sharply drained, gravelly soil, in a sunny spot with protection from cold winds and winter wet. Flowering is best in hot summers. May also be grown in a cold greenhouse, in a peat-free, loam-based compost with added grit

Propagation

Propagate by seed, by division as growth begins in spring, or by basal or softwood cuttings

Suggested planting locations and garden types

  • Cottage and informal garden
  • Gravel garden
  • Banks and slopes
  • Wall side borders
  • Conservatory and greenhouse

Pruning

No pruning required

Pests

Generally pest-free

Diseases

May be susceptible to hollyhock rust