Growing Conditions · Wales
Isle of Anglesey Growing Conditions
Soil, hardiness and a planting calendar for Isle of Anglesey — across 9 postcode districts.
Soil
A slowly draining, acid clay loam that holds winter wet and warms late in spring. It grows acid-loving shrubs, rhododendrons and moisture-lovers well, but vegetables need raised beds, grit and organic matter, and lime if you want a wider range. Its winter wetness makes drainage and grading the first job on any paving, lawn or wall.
Winter hardiness
A mild area rated RHS H3 — winters usually bottom out around -2°C. Most hardy plants are safe, and you can grow half-hardy exotics that fail further north, but the occasional hard frost means tender plants still want a sheltered wall or winter fleece.
Rain & growing season
A wet climate (1220mm a year): plants rarely go thirsty, but lean on good drainage, disease-resistant varieties and falls that shed water off paving and lawns. A long growing season (~365 frost-free days) — you can sow earlier and harvest later than most of the country, and squeeze in a second late sowing.
Planting Calendar for Isle of Anglesey
The long season allows a second sowing of quick crops in July.
Timings are guided by this area's ~365 frost-free days and RHS H3 hardiness; adjust for a cold or sheltered garden.
Conditions by Postcode
| Postcode | Soil | Hardiness | Rainfall |
|---|---|---|---|
| LL60 | acid clay loam, seasonally wet | RHS H3 | 1220mm |
| LL61 | acid clay loam, seasonally wet | RHS H3 | 1220mm |
| LL62 | acid clay loam, seasonally wet | RHS H3 | 1220mm |
| LL63 | free-draining acid loam — the classic 'good garden soil' | RHS H3 | 1220mm |
| LL64 | free-draining acid loam — the classic 'good garden soil' | RHS H3 | 1220mm |
| LL65 | acid clay loam, seasonally wet | RHS H3 | 1220mm |
| LL68 | free-draining acid loam — the classic 'good garden soil' | RHS H3 | 1220mm |
| LL74 | free-draining, fertile near-neutral loam | RHS H3 | 1220mm |
| LL75 | free-draining, fertile near-neutral loam | RHS H3 | 1220mm |
