Summer wouldn't be the same without salads, but it is possible to produce crunchy crisp lettuce and other salad crops over a much longer period if you have a greenhouse or garden frame to help extend the season.

Most salad crops should be successional sown - that is sowing a few seeds every fortnight rather than all in one go to keep the season going and to prevent gluts and famines.

Many can be grown as cut-and-come-again crops, taking a few leaves from the plants on a regular basis and allowing new leaves to grow back.

Celery
Lettuce
Radish
Salad leaves - Chinese cabbage, claytonia, corn salad, Good King Henry, land cress, rocket
Salad onions