Green plant food

As you finish your early harvests of broad beans and new potatoes, fill the gaps by broadcast-sowing summer green manures such as phacelia or buckwheat, available in large packets of seed from our garden centre. The lush green top growth is full of nitrogen: shear this off a few weeks before you want the bed again and add it to the compost, then fork the roots into the ground to rot down and feed your next crop.