What to sow in London in May

In May, London averages 13 °C, with nights around 9 °C.

Frosty nights are usual from November to March: the last frost typically comes in March.

A typical winter's coldest night: −3 °C.

Warm months (15 °C or more on average): June to September.

Sow outdoors

In pots or trays somewhere warm, to plant out later.

Set London as your place in the app to see what to sow in your own garden, with your sowings and the weather. Set my place

Worked out from the last ten years of London's climate and each plant's needs: germination temperature, frost limit and time to harvest.