Gardening in County Londonderry
County Londonderry spans windy Atlantic and North Coast ground, the broad lower River Foyle landscape and higher, wetter country towards the Sperrins. Coastal gardens can be relatively mild in winter but exposed to strong winds, while inland and upland plots are cooler and slower in spring. Rain and variable weather favour resilient planting. The best gardens use shelter, drainage and a close reading of their particular slope, soil and exposure.
The growing season in County Londonderry
Based on the Northern Ireland region: last spring frost mid to late May, first autumn frost late October to early November.
Northern Ireland's maritime climate is often mild and damp, with a reasonably long growing season in sheltered lowland and coastal gardens. However, inland hollows and higher ground can catch late frost, while wind can slow tender growth. These are approximate regional averages only: exposure, altitude, aspect and local cold-air drainage all matter more than one calendar period.
What grows well in County Londonderry
Favour reliable crops that cope with a cool, moist season: potatoes, peas, broad beans, brassicas, leeks, chard, salads and currants. On exposed coastal sites, establish wind filters and choose low, sturdy plants rather than tall, flimsy growth. Sperrin-side gardens benefit from raised beds, early varieties and protection for young plants. Where soil is heavy, compost and careful cultivation improve its texture. Use a greenhouse or polytunnel for tomatoes, peppers and other heat-loving crops.
Plan your County Londonderry garden
Gardening in County Londonderry: frequently asked questions
When is the last frost in County Londonderry?
The last spring frost in County Londonderry is typically around mid to late May, and the first autumn frost around late October to early November, based on the Northern Ireland region.
When can I start planting outdoors in County Londonderry?
Hardy crops can be sown from early spring. Wait until after the last frost (around mid to late May) before planting out tender crops such as tomatoes, courgettes and runner beans.
What grows well in County Londonderry?
Favour reliable crops that cope with a cool, moist season: potatoes, peas, broad beans, brassicas, leeks, chard, salads and currants.
Frost and season figures are approximate regional averages; aspect, altitude and shelter shift them locally. Check the current Londonderry forecast before sowing tender crops. Page updated 19 Sep 2026.