species
Althaea officinalis
Marshmallow · Marsh mallow
Photo: Ата · CC0 · via Wikimedia Commons
Althaea officinalis belongs to the family Malvaceae, also known as Marshmallow or Marsh mallow, native to the UK. It reaches 2 m tall and 1 m across. It grows in full sun or part shade, where the ground is neutral or alkaline and in well drained or moist conditions. It tolerates coastal exposure. It flowers from August to September. Its RHS hardiness rating is H6 (hardy, very cold winter): −20 to −15°C.
Assembled from the attributes recorded below.
What this plant needs
- Size at maturity
- 2 m tall × 1 m across
- Hardiness
- H6 (RHS)
- Aspect
- Full sun, Part shade
- Acidity
- Neutral, Alkaline
- Moisture
- Well drained, Moist
- Coastal
- Tolerates salt wind
- In the UK
- Native
When it flowers
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
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