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A picture of a Rose mallow

Rose mallow

Hibiscus moscheutos

Also known as

Swamp rose, Common rose mallow, Sea hollyhock

Full Sun
Moderate watering
Frost Hardy

H4

RHS hardiness

-10°C

Minimum temperature

Expected size

Height
Spread

2.5m

Max

1.25m

1.2m

Min

30cm

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Rose mallow

A photo of Rose mallow
A photo of Rose mallow

Rose mallow Overview

This species produces large constant blooms in the summer. The flowers will only last one day, but are continuous throughout late summer until the first autumn frost. The foliage is deep green with large and heart-shaped leaves. The Rose Mallow requires constantly moist soil and will not tolerate dry conditions. Prefers full sun but will need partial shade in hot, humid climates. For the biggest flowers try 'Super Giant'.

Common problems with Rose mallow

How to propagate Rose mallow

Cuttings

Seed in spring, shrubs and trees by greenwood cuttings in late spring. Semi-ripe cuttings in summer, perennials by division in autumn or spring.

Seed

Division

Other uses of Rose mallow

Bog, border, hedging, cutting bed