You don't need to get rid of it you just need to build it up. If you are just growing vegies etc (shallow rooted things) sure replace it if you want but if you are growing trees, shrubs etc you need to leave the clay in tact and build it up with COPIOUS amounts of organic matter attracting worms.Bobby wrote:Black Orchid wrote:Oh and lots and lots of worms.Black Orchid wrote:Clay is good, if you can build it up well enough, as it holds nutrients and water better than most other soils.
If it is hard and compacted you will need to have it rotary hoed. I would prefer to build it up with copious amounts of organic matter rather than use gypsum.
So my father may have been right to just get rid of the clay for his garden bed?
Anything that does NOT have a shallow root system will eventually hit the clay if you have dug it all out. And it will act like a bucket/basin and when it rains all the water will collect on top of the clay underneath the imported soil and when the roots hit the full on clay (after growing freely in imported soil) the roots, when they hit the clay, will have nowhere to go and the trees will be stunted. Plus if it rains and the water is like an underground lake between the clay and the imported soil the root systems of trees etc can just rot.