I have a lot of green & brown waste too.
The simple kiln is incredible at burning through it all. Very minimal smoke even when burning green leaves. The size allows you to add whole branches and logs without spending hours chopping into smaller peices.
It's a brilliant design (also not mine).
I imagine with a good bed of coals in that thing, it would burn almost anything.
Do you have an infrared thermometer? I would be curious how hot you could get it.
No thermometer but it's very hot work - it's like being in a sauna working around it. You can feel the heat radiating from the iron quite a few metres away.
When you put a branch with leaves in it, they seem to spontaneously combust in a ball of hot air. It wasn't until I did my own burn that I fully grasped how clever the design was.
