Growing Conditions · England
Westminster Growing Conditions
Soil, hardiness and a planting calendar for Westminster — across 8 postcode districts.
Soil
A deep, fertile loam with groundwater close to the surface — productive in summer, but wet in winter and slow to warm. Choose moisture-tolerant planting, raise beds for vegetables, and expect strong growth once it dries. Drainage and raised levels matter for paving and lawns.
Winter hardiness
Rated RHS H4 — the UK mainstream, with winter lows near -6°C. The vast majority of garden plants, perennials, shrubs and trees come through a normal winter unprotected; only genuinely tender exotics need a warm corner or cover.
Rain & growing season
One of the drier parts of the country (727mm a year), so established beds still need summer watering and drought-tolerant planting pays off. A typical UK growing season (~330 frost-free days), with the last frosts clearing through spring and first frosts returning in autumn.
Planting Calendar for Westminster
Timings are guided by this area's ~330 frost-free days and RHS H4 hardiness; adjust for a cold or sheltered garden.
Conditions by Postcode
| Postcode | Soil | Hardiness | Rainfall |
|---|---|---|---|
| W1B | — | RHS H4 | 727mm |
| W1C | — | RHS H4 | 727mm |
| W1F | — | RHS H4 | 727mm |
| W1H | fertile loam with a high water table | RHS H4 | 727mm |
| W1K | fertile floodplain soil with a high water table | RHS H4 | 727mm |
| W1S | — | RHS H4 | 727mm |
| W1U | — | RHS H4 | 727mm |
| WC2E | free-draining acid loam — the classic 'good garden soil' | RHS H4 | 727mm |
