Growing Conditions · Wales
Caerphilly Growing Conditions
Soil, hardiness and a planting calendar for Caerphilly — across 12 postcode districts.
Soil
A workable loam-to-clay that drains slowly, so water can pond after heavy rain and roots sit cold in winter. Most shrubs and perennials do well once established; add grit and compost for vegetables, and choose damp-tolerant plants for low spots. Landscaping projects should plan for falls, French drains or soakaways so paving and lawns shed water.
Winter hardiness
Rated RHS H4 — the UK mainstream, with winter lows near -7°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
A wet climate (1096mm a year): plants rarely go thirsty, but lean on good drainage, disease-resistant varieties and falls that shed water off paving and lawns. A typical UK growing season (~336 frost-free days), with the last frosts clearing through spring and first frosts returning in autumn.
Planting Calendar for Caerphilly
Timings are guided by this area's ~336 frost-free days and RHS H4 hardiness; adjust for a cold or sheltered garden.
Conditions by Postcode
| Postcode | Soil | Hardiness | Rainfall |
|---|---|---|---|
| CF14 | loamy-clay with impeded drainage | RHS H4 | 1006mm |
| CF15 | free-draining, fertile near-neutral loam | RHS H4 | 1006mm |
| CF3 | loamy-clay with impeded drainage | RHS H4 | 1006mm |
| CF37 | free-draining acid loam — the classic 'good garden soil' | RHS H4 | 1006mm |
| CF46 | slowly draining, very acid peaty upland soil | RHS H4 | 1186mm |
| CF48 | free-draining, fertile near-neutral loam | RHS H4 | 1186mm |
| CF81 | shallow, free-draining acid loam over rock | RHS H4 | 1186mm |
| CF82 | acid clay loam, seasonally wet | RHS H4 | 1186mm |
| CF83 | free-draining acid loam — the classic 'good garden soil' | RHS H4 | 1006mm |
| NP10 | loamy-clay with impeded drainage | RHS H4 | 1006mm |
| NP12 | shallow, free-draining acid loam over rock | RHS H4 | 1186mm |
| NP24 | shallow, free-draining acid loam over rock | RHS H4 | 1186mm |
Planning work in Caerphilly?
Browse Companies House-registered landscaping businesses in the area.
