species
Alcea rosea
Hollyhock
Scale drawing from this record, beside a 1.7 m figure.
Alcea rosea is a biennial in the family Malvaceae, also known as Hollyhock, introduced before 1500 and long since part of the landscape. It reaches 2 m tall and 60 cm across in about 10 years. It grows in full sun, on loam or clay soil, where the ground is acid or neutral and in moist or well drained conditions, and suits average positions. It flowers from July 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 × 60 cm across, after about 10 years
- Hardiness
- H6 (RHS)
- Lifecycle
- Biennial
- Aspect
- Full sun
- Soil
- Loam, Clay
- Acidity
- Acid, Neutral
- Moisture
- Moist, Well drained
- Exposure
- Average
- In the UK
- Archaeophyte (pre-1500)
When it flowers
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
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