Sidalcea candida

RHS Plant Profile

modest mallow

Other common names

white prairie mallow

Herbaceous Perennial

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A rhizomatous perennial to 75cm tall, with deeply lobed basal leaves. In summer it produces stiff, unbranched stems bearing pure white, satin-petalled flowers

Position

Full sun, Partial shade

Soil Types

Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Loam Sand

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

Position

Full sun Partial shade

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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Malvaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Sidalcea can be annuals or perennials, forming a clump of rounded or palmately lobed basal leaves, with erect stems bearing more deeply divided leaves and terminal racemes of 5-petalled mallow-like flowers
Name Status: Correct

How to Grow

Cultivation

Grow in moderately fertile, moist but well-drained, light, neutral to slightly acid soil in full sun

Propagation

Propagate by division, or by sowing seed in containers in a cold frame in autumn or spring

Suggested planting locations and garden types

Cottage and informal garden
Wildlife gardens
Low Maintenance
Flower borders and beds

Pruning

Deadhead to prolong flowering

Pests

May be susceptible to slugs and snails

Diseases

May be susceptible to rust diseases