Gardening in Hertfordshire
Hertfordshire sits between London's urban influence and the open countryside of the East of England. It is often relatively dry, but its rolling ground, clay soils and small valleys mean that cold air can collect locally in spring. South-facing, sheltered gardens can be productive for a long season, whereas exposed northern or valley plots need more caution with tender plants. Good drainage and moisture conservation are recurring themes for local gardeners.
The growing season in Hertfordshire
Based on the East of England region: last spring frost mid May, first autumn frost late October to early November.
Often sunny and relatively dry, the East of England can produce excellent growing conditions, yet inland sites may cool quickly under clear skies. The broad landscape includes exposed coasts, fenland and sheltered town gardens, so frost timing varies considerably. These are only approximate regional averages: local drainage, altitude, aspect and cold-air hollows can lengthen or shorten the season.
What grows well in Hertfordshire
Hertfordshire's often heavy, fertile clays are well suited to apples, plums, currants, brassicas, leeks and runner beans once worked with compost. Raised beds help where winter wet lingers, while a mulch keeps cracking clay productive in dry spells. Grow tomatoes, cucumbers and courgettes in the sunniest, most sheltered positions, perhaps against a wall. In rural frost pockets, delay vulnerable sowings and favour hardy peas, broad beans and perennial herbs early on.
Plan your Hertfordshire garden
Gardening in Hertfordshire: frequently asked questions
When is the last frost in Hertfordshire?
The last spring frost in Hertfordshire is typically around mid May, and the first autumn frost around late October to early November, based on the East of England region.
When can I start planting outdoors in Hertfordshire?
Hardy crops can be sown from early spring. Wait until after the last frost (around mid May) before planting out tender crops such as tomatoes, courgettes and runner beans.
What grows well in Hertfordshire?
Hertfordshire's often heavy, fertile clays are well suited to apples, plums, currants, brassicas, leeks and runner beans once worked with compost.
Frost and season figures are approximate regional averages; aspect, altitude and shelter shift them locally. Check the current Luton forecast before sowing tender crops. Page updated 19 Sep 2026.