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- #281
Got a question:
I'm starting to accumulate used first-round kit soil, and I've been keeping it in its own bin. I also have another 30 gallons of kit soil cooking. When that's ready, I'll be using it for each new pot, over time, not all at once.
I'm wondering if it would necessarily be a bad idea to mix the used soil in with the new soil. I'd add amendment and mix it up, and then dump it in with the rest and mix that up. All the roots and biota from the chopped plant would go into the new soil and blend with the rest. It seems like that would benefit both batches.
It's somewhat bad discipline, I suppose - end up mixing any pathogens - but you also mix beneficials.
Bad idea?
That's pretty much what we all do, more or less. The soil, in my experience, gets better for 3 runs and then the 4th run kinda drops off. Curso seems to be having success with his 4th run soil I think, but he adds fresh Promix and more worm castings each time, and amends with the "second run" amendment.
Perhaps he'll see this and chime in.
I put it all into a tub, mix it in with fresh amendment and worm castings and let it cook in the can for another month. I pull the root stems out, after mashing the rootballs with a shovel, but all the other roots remain and get eaten up in about 10 days. I do wet this soil down with a bit of tea in water.