Green Manures....again

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You can sow winter tares, field beans, grazing rye or italian ryegrass now. They will establish and then grow away fast at the first hint of Spring. It is probably best to allow these to grow to produce bulk for digging in so plan to plant late crops to follow them eg runner beans, squashes, main crop potatoes, brassicas. They should be dug in a month before you plant the next crop to allow them to start to rot down.

Winter tares and field beans are legumes and will fix nitrogen in their roots for the following crop to use as well as producing bulk green material for digging in. They are both easy to dig in.

Grazing rye and italian ryegrass both produce green material for digging in but also have large fiborous root systems which will help the soil structure no end. Grazing rye can be a bit of a brute and you may need to mow it off to control it before digging. Italian rye grass is less vigorous and easier to manage but if you want bulk go for the grazing rye.

Next Spring you could look at sowing phacelia or mustard as a short term green manure before later planted vegetables. These will both give reasonable bulk of green material in about 3/4 weeks.

You could also look at sowing  clover for a longer period to be dug in  at the end of the Summer. I know this takes the land out of production for a year but it would improve the soil. Italian ryegrass can also be left to grow for the Summer but mow it before it seeds.

Make a compost heap.

Grow them seperately as this will make them easier to manage. Why not try a block of each and see which you like best?