Unlike with last year’s batch, temperatures in my HotBin have been solidly in the green on its dial. It’s been steaming away. I’ve been filling it up with uncooked vegetable kitchen waste since February, when I set it up after the scaffolding had come down. I’ve been mixing these GREENS with BROWNS, these fine wood chips, and paper waste. If anything, I would say I need a higher proportion of BROWNS in future, but it still smells good and aerobically composted.
The cats were pretty fascinated as I prized off the lid and scooped out the very bottom later from the HotBin. It looks pretty disgusting, I’d agree.
The first thing was to sieve the composted material. Because it’s a HotBin, and by its very nature moist, the result is not a fine tilth, but more like a cakey sludge. That’s a problem I was determined to solve.
Because I’ve found that my own compost is too much like a Black Forest gâteau, I’ve given a lot of thought as to what to add to it to give it some lightness and also the ability to drain better. In the past, I’ve used Perlite, but it’s not really doing anything in the soil.
So, after I’ve come across it repeatedly in my research for “The Garden”, and I’m a huge fan of the Carbon Gold range of compost mixes, I thought I would try amending it with biochar. In the past, I have used Carbon Gold’s own biochar amendment, but I need larger quantities than the small punnets I can get from them.
Then for good measure, and because I’m a little concerned about the possible acidity of my mix, I added a handful or two of Moorland Gold which I’ve been trialling. Really, I’d like to be making all my own compost. I bought too much this year. It seems crazy to be buying compost and throwing away organic matter from the household.
Because I only scooped out the bottom layer, this process only resulted in four small pots-worth. I moved four Lemon Tree seedlings into these pots, which I have grown from pips. There’s a lot of light on the roof garden, so I’m hoping these thrive.
