Harman UK

London & the South East cities Vegetable Planting Calendar

Sowing and planting dates for vegetables in London & the South East cities, worked out from the region's average frost dates. Last spring frost: late April to early May. First autumn frost: November.

Hardy vegetables

These tolerate cold and can be sown from a few weeks before the last frost, as soon as the soil is workable. Some are also worth starting under cover for an earlier crop.

VegetableStart indoorsSow / plant outdoorsLast sow for autumn
Beetroot - 3 Apr 31 Aug
Bok Choy 3 Apr 17 Apr 5 Sep
Broad Beans 1 May 3 Apr 1 Aug
Broccoli 20 Mar 17 Apr 21 Aug
Brussels Sprouts 20 Mar 17 Apr 17 Jul
Cabbage 20 Mar 10 Apr 16 Aug
Carrots - 10 Apr 16 Aug
Cauliflower 20 Mar 17 Apr 16 Aug
Celery 20 Feb 8 May -
Corn Salad 1 May 3 Apr 26 Aug
Endive 27 Mar 17 Apr 27 Jul
Fennel 3 Apr 17 Apr 6 Aug
Kale 20 Mar 10 Apr 31 Aug
Kohlrabi 3 Apr 17 Apr 31 Aug
Leeks 20 Feb 17 Apr 27 Jun
Lettuce 3 Apr 3 Apr 5 Sep
Mustard Greens - 17 Apr 10 Sep
Onions 20 Feb 3 Apr -
Parsnips - 17 Apr 27 Jun
Peas - 20 Mar 26 Aug
Potatoes - 17 Apr -
Radicchio 27 Mar 17 Apr 16 Aug
Radishes - 3 Apr 27 Sep
Rocket - 17 Apr 15 Sep
Sorrel 20 Mar 10 Apr 26 Aug
Spinach - 20 Mar 10 Sep
Spring Onions - 17 Apr 26 Aug
Swede - 1 May 22 Jul
Swiss Chard 3 Apr 17 Apr 31 Aug
Turnips - 17 Apr 5 Sep
Watercress 10 Apr 17 Apr 26 Aug

Tender vegetables

These are damaged by frost. Start them under cover and plant out only once the risk of frost has passed in your own garden. Harden plants off over a week or so before they go outside.

VegetableStart indoorsSow / plant outdoorsLast sow for autumn
Aubergine 6 Mar 15 May -
Courgette 10 Apr 8 May 5 Sep
Cucumbers 10 Apr 8 May 31 Aug
Edamame 1 May 15 May -
French Beans - 1 May 31 Aug
Melons 10 Apr 15 May -
New Zealand Spinach 3 Apr 15 May -
Peppers 6 Mar 15 May -
Pumpkins 10 Apr 8 May -
Summer Squash 10 Apr 8 May 3 Sep
Sweet Corn - 8 May -
Sweet Potatoes - 22 May -
Tomatoes 20 Mar 8 May -
Winter Squash 10 Apr 8 May -

"Sow / plant outdoors" is the transplant-out date where a crop is started indoors, otherwise the direct-sowing date. "Last sow for autumn" is the latest sensible sowing for a crop to mature before the first autumn frost.

Reading these dates

These are guides based on London & the South East cities's approximate average frost dates, not a forecast. Aspect, altitude, shelter and the weather in any given year can shift them by two weeks or more, so treat them as a starting point and adjust to your own plot. Sow a little later in a cold spring and keep horticultural fleece ready for a late frost.