Frost Dates in South West England
late April to mid May
late October to November
The growing season here
One of Britain's longest growing seasons, shaped by mild maritime conditions. Coastal Cornwall, Devon and sheltered urban gardens may stay largely frost-free for long spells, while inland valleys and higher ground can be notably colder. These are approximate regional averages only: aspect, altitude and frost pockets can make a garden behave very differently.
What it means for sowing & planting out
Start hardy vegetables and flowers outdoors early where soil is workable, but treat tender crops cautiously. Tomatoes, courgettes, beans and bedding plants can be raised under cover in spring, then planted out only when frost risk has truly passed in your own garden. Many coastal plots can plant earlier than inland ones, but check the Met Office forecast and keep fleece ready for a cold snap.
Tips
Make the most of the long season with succession sowings into late summer. Damp, mild weather can encourage slugs and fungal problems, so allow good spacing and airflow. Sheltered coastal gardens may support tender plants, but exposed sites and valley bottoms still need sensible frost protection.
These are approximate regional averages - frost varies with altitude, frost pockets, coast and aspect. Check the Met Office forecast for your area before acting. Page updated 19 Sep 2026.