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H
FlowersHardyBiennial
Hollyhock
Hollyhock is a tall traditional cottage-garden plant grown for dramatic spires of flowers in midsummer. It is often treated as a biennial or short-lived perennial and is especially effective against walls, fences and the back of sunny borders.
Basic information
Category
Flowers
Lifecycle
Biennial
Hardiness
Hardy
Planting partners
0 companions · 0 crops to avoid
Growth profile
Germination window
10–21 days
Germination temperature
15–20 °C
Plant spacing
60 cm
Row spacing
75 cm
Sowing depth
0.5 cm
Height
200 cm
Spread
60 cm
Calendar
JJan
FFeb
MMar
AApr
MMay
JJun
JJul
AAug
SSep
OOct
NNov
DDec
Sow Indoors
Sow Outdoors
Plant Out
Flowering / Harvest
Timings based on average frost dates in the UK. Sign up to set your frost dates.
Care tips
Give hollyhocks full sun, fertile soil and good air movement to help reduce rust pressure on the foliage. Stake in exposed positions, remove badly affected leaves promptly, and allow a few seedlings to replace older plants if you want the display to continue year after year.
Common pests
Rust, aphids, slugs, hollyhock weevil.
Companions
No companion crops have been added yet.
Don’t grow with
No crops to avoid have been added yet.