How to sow green manure
We have found that sowing a green manure between crops of cut flowers or vegetables makes for a much better harvest the following year.
Here’s our simple guide to sowing green manure in autumn for digging in the following spring.
You will need:
- A clear bed dug to a fine tilth. (Not as hard as you think if you have just removed this year’s crop.)
- An enthusiastic pair of hands. (In this case, Harry.)
- Seeds. (Here we are using hungarian forage rye. Being from a different plant family, it won’t harbour diseases that might affect next year’s sweet peas. Mustard is another good choice.)
- Some old CDs, short bamboo canes and string.
Scatter the seeds across the bed on a day when there has been some rain in the night but the temperatures are still mild.
The image below shows roughly the rate at which we sow.
Lightly rake over the bed so that the seeds are covered.
Attach the string to the top of each bamboo cane and hang the CDs on the bottom. You should end up with a ‘fishing rod’ shape with a CD attached to the end. The CDs will spin in the wind.
Place these at regular intervals to deter birds.
Mice and voles can take your whole crop but our TOP TIP is to fill a small tin with corn and place it nearby. The mice will happily eat more of this and less of your crop.
After about 10 days it should look like this!
Allow it to grow all winter and dig and chop the crop into the soil next spring. (About 2 weeks before planting out your summer flowers or vegetables.)
Why it works:
Green manure works on our free draining soil because it locks up the nutrients in the rye leaves throughout the winter. When we dig in the green plants, we keep the nutrients near the surface.
If we leave the ground bare, winter rain causes the nutrients to leach out into the subsoil where they become inaccessible to crops with shallow root systems.
By next summer, this bed will be filled with our grandiflora sweet peas. With all this extra food available to them they will look fantastic!