Soil Treatment Which Has Been Under A Shed For Years

Question

Soil is woody

Answer 1

You can work some amendments into it like compost and coir. Here is more:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/compost-as-soil-amendment.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/how-to-improve-clay-soil.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/peat-moss-alternatives.htm