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A picture of a Hollyhock

Hollyhock

Alcea rosea

Also known as

Common Hollyhock, Garden Hollyhock, Rose Mallow

Full Sun
Moderate care
Light watering
Frost Hardy

H5

RHS hardiness

-15°C

Minimum temperature

Expected size

Height
Spread

2.5m

Max

1m

1.5m

Min

50cm

2 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

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A photo of Hollyhock
A photo of Hollyhock
A photo of Hollyhock
A photo of Hollyhock
A photo of Hollyhock

Hollyhock Overview

An old garden favourite, this short lived perennial only occasionally flowers in its first year. Tall flower spikes up to 2 m form in summer, with usually pink flowers but sometimes shades of red, yellow, cream and white. Flowers may be double or single.

Common problems with Hollyhock

Young growth can be attacked by caterpillars; flea beetles occasionally causes significant defoliation

How to harvest Hollyhock

Collect seed in late summer/ early autumn, however colour will not come true if other varieties are nearby.

How to propagate Hollyhock

Seed

Sow late winter in pots/modules at 13C for flowers in the same season. Or direct sow in midsummer if treating as a biennial.

Special features of Hollyhock

Attracts butterflies

Attracts bees

Other uses of Hollyhock

This plant suits informal cottage style gardens planted in flower borders/beds or wall-side borders.

Flowers - Sow Under Cover in October.

Thinking ahead to next year - sow these seeds for early spring and summer colour.

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Looking good in July - Top 10

Traditionally flowering in July, these flowers will be at their best this month.

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