Hi!
We have a competition size tennis court (20m x 40m) that we'd like to convert into an annual garden. It is just compacted clay, dug out about 1.5ft below the surrounding land. After a rain, it will be around 1/3 covered with some tough grasses and weeds, but is generally mostly just a red clay cover, teaming with ants. Since the court is already enclosed, since it sits at the bottom of 3 small slopes, and since it is in close proximity to the house, it makes sense (according to my logic) to convert it to a veggie garden.
So far I've looked into hugelkultur, but being in a very hot Australian region with periods of drought each year, it isn't logical to have 5ft tall beds. I then looked into a reverse kind of hugelkultur where pits are dug and filled with organic matter. As we mostly only have access to eucalyptus tree logs which take forever to break down, it would only be possible to use very bulky mulch topped with manure, twigs etc. However, the more I read, the more evidence there is to suggest that disturbing the soil is always a bad idea and that it's better to build new soil on top of the existing layer. I also read that there are dangers when digging into clay soil for planting as because its so compacted, the water gets trapped there and can't escape. At the same time, I've read that this method is good for dryer regions as it holds the water and keeps the plant roots cooler. All in all, I'm pretty confused with all the conflicting info, which I understand is all true based on different regions and circumstances. I just can't find many examples or sources that are specific to my own circumstances.
One thing I know for sure is that nothing can be planted on the tennis court without a help from us, or without waiting a couple of hundred years for it to repair itself. I'm just wondering if anyone can give me some advice that would be specific to our climate and situation so that we can avoid making big mistakes?
At this point, the idea was to dig various sized pits and fill with mulch and organic matter, and have lawn mower wide paths in between which would be planted with living mulches/green manures that could be deposited on the beds after each mow.
Thanks in advance for any help!!!
Kate