Malva trimestris

RHS Plant Profile
royal mallow

Other common names

annual lavatera, common annual tree mallow

Synonyms

Lavatera trimestris

Plants for pollinators
Annual Biennial

An upright annual, to 1.2m tall, with rounded, shallowly-lobed leaves and open funnel-shaped flowers to 10cm across. Many of the named cultivar selections are smaller in stature with a more compact habit. Flowers appear in mid to late summer in shades of pink or white, often with darker veining of the throat

Position

Full sun

Soil Types

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

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

Position

Full sun
Aspect
South–facing or East–facing
Exposure
Sheltered
Hardiness
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
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
Correct

How to Grow

Cultivation

Grow in light moderately fertile, well-drained soil in full sun

Propagation

Propagate by seed sown in situ in mid-spring

Suggested planting locations and garden types

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

Pruning

Cut back after flowering

Pests

Generally pest-free

Diseases

May be susceptible to stem rot, soil-borne fungal diseases and a rust