Clay consists of minute mineral particles that tend to cling tightly together. Because there are lots of them they have a big surface area which efficiently hangs on to water and nutrients. Hence clay soils are heavy and wet. Soils with larger particles have more air space and allow the passage of water more freely. So if you can make the soil particles in a clay soil larger you improve drainage and texture.
When improving drainage with clay soil it should always be done with a coarse horticultural grit instead of the Horti grits you find with sand mixed in; the sand element will make the clay soil worse. 👎🏼
On extremely heavy, solid clay adding grit to the ground in autumn can be very effective, especially if it is spread on the soil surface with copious amounts of organic matter such as Corkers green compost or Corkers mushroom compost. Again, if the soil is rough dug and left in large lumps, the grit and organic matter are spread across the surface, winter wet and frost do the work. The grit gradually sinks into the soil taking the garden compost with it.
We hope you find this video useful and please head over the @simplygrowfood to find more on how to get the most out of your kitchen garden. 😁
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