For British growers
Growli for UK gardeners
— RHS, frost, and care that fits a British home.
Growli's UK section uses RHS hardiness ratings (H1a–H7), British postcode-based frost averages, and indoor advice tuned for radiator-heated homes and short winter days. Use the hubs below to find your rating, what to plant when, and how to water and place each species for a British climate.
RHS hardiness ratings →
H1a–H7 explained for British growers — what each rating means, which plants survive your coldest winter, and the standard most UK vets and nurseries cite.
UK hardiness zones — by postcode →
Find your RHS rating by postcode and see what to plant when. Per-crop sowing calendars for England, Scotland, Wales and Northern Ireland.
Watering, the UK way →
British tap water, radiator-warmed air, and short winter days change watering for most species. Per-species cadence tuned for a typical UK home.
Temperature & humidity (UK homes) →
The classic UK problem — radiator-dry air against cold single-glazed panes. Per-species placement, humidity targets, and winter care.
What is different about UK plant care?
Three things distinguish British plant care from American: the hardiness framework is RHS-based (an absolute minimum temperature per plant), not USDA-zone-based (a regional map). The light is dimmer in winter than nearly any US state. And the housing stock — single-glazed Victorian sashes against radiator-driven heating — creates a unique micro-climate of cold panes plus hot dry air that's rough on tropicals.
Each Growli UK hub is tuned for those facts. Pick a hub above to dig in.