We made bamboo biochar on the weekend. There’s some impressive science behind the idea that biochar, and especially bamboo biochar, might be a cheap, fast, effective way to remove huge amounts of carbon from the atmosphere and add it to the soil. And biochar does such good things for soil quality.
Someone asked me in a comment about my seed raising mix, so it’s a good opportunity to do a whole post about it. My recipe has changed with the availability of ingredients. But the concepts remain the same. Permaculture is like that – not a recipe but a system to be applied differently to every site.
This is the third, and last of my three major soil building factories – the worm farm. The hardest part was getting the cast iron bathtub. It was on Gumtree as a giveaway, come and get it, bring a trailer. Beauty. What they didn’t say was that it down over the edge of the drive on a slippery muddy slope at the top of a very steep driveway with no…
Chooks and worms do the bulk of my soil building, but compost can only contain the micronutrients of the ingredients that go into it. Using some ingredients from trees that deep mine subsoil, and some weeds that are dynamic accumulators helps, but the hero for micronutrients is seaweed, and the best way I’ve (yet) discovered to process it is by fermenting.
The biggest (by far) mistake that I see beginner food gardeners make is underestimating the payoff you get for soil building. Water, sun, the right plant for the season, heritage varieties, pest predators – they are all important, but nothing gives you more harvest for effort than building soil.