As beds get cleared when crops are harvested, if you don’t have another crop ready to drop into them, then try a green manure. Some of the summer ones can be sown until the end of August – like clover, mustard and phacelia, and others can be sown in September and October – like field beans, yellow trefoil and grazing rye. Green manures can play a big part in preventing the winter heavy rain from washing out all the nutrients and damaging the soil structure. Covering exposed soil with cardboard over the winter can also help prevent soil damage and can be dug in before planting next spring.
Planting seeds for autumn and winter harvesting
You can fill the gaps in your beds with quick germinating seeds from Asia, such as mizuma, mibuna, mustards and choy sum; you can plant in containers as well as the open ground or grow some in pots and plant into your greenhouse once the tomatoes, peppers and cucumbers are finished.
Alys Fowler, writing in the Guardian, also suggests planting bulb fennel and using them as baby fennel. Spring and bunching opinions will also germinate quickly in warm soil but watch out for slugs who seem to like them.
Black radish can be sown now and harvested from the end of October.
It is now the time to get your winter salads sown in modules and then planted out by the end of August; succession sow two or three types of winter lettuce and they can last you through till March. Rocket and land cress can be sown directly into the ground from the middle of August or in containers near to your back door for ease of harvesting when the weather is not so nice.