Green manure are crops of selected annual and perennials that can be grown to cover beds – often over winter – and then dug in to add organic nutrients and matter to poor soil.
Green manures help from ground becoming overly compacted and also help to maintain the space and keep weeds down.
Legumes such as clover, trefoil and vetches fix nitrogen via bacteria.
Hardy green manures for overwintering allotment beds
- For August sowing, scatter seeds of clover, trefoil and common vetch.
- Cut top growth and dig in before it flowers. Then leave 6 weeks before sowing a new crop.
- In spring use mustard seed for green manure.