Growing Conditions · Northern Ireland
Antrim and Newtownabbey Growing Conditions
Soil, hardiness and a planting calendar for Antrim and Newtownabbey — across 8 postcode districts.
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 (1145mm 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 (~361 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 Antrim and Newtownabbey
The long season allows a second sowing of quick crops in July.
Timings are guided by this area's ~361 frost-free days and RHS H3 hardiness; adjust for a cold or sheltered garden.
Conditions by Postcode
| Postcode | Soil | Hardiness | Rainfall |
|---|---|---|---|
| BT14 | — | RHS H3 | 1096mm |
| BT29 | — | RHS H3 | 1096mm |
| BT36 | — | RHS H3 | 1169mm |
| BT37 | — | RHS H3 | 1169mm |
| BT38 | — | RHS H3 | 1125mm |
| BT39 | — | RHS H3 | 1169mm |
| BT41 | — | RHS H3 | 1169mm |
| BT42 | — | RHS H3 | 1169mm |
Planning work in Antrim and Newtownabbey?
Browse Companies House-registered landscaping businesses in the area.
