Sow some companion crops in there, every species of plant activates different fungi and bacteria.
The more of them are active, the more fertile the soil.
Diversity makes it all happen on its own and creates its own stability and fertility, everything becomes much more robust and resilient.
When you forget watering, the companioncrops will die first and in fact feed the soil.
You are still in full control and can prune the companioncrops to your liking.
Basil, for example, is a perennial and after about a year their stems will turn woody and very strong, so you can use them for LST training.
Same with the old stems of your cannabis plants, I let them sit and harvest only the side branches.
Pepper plants seems to also be great companion plants.
Now and then I chuck a small handful of seeds in there as I win them in the Free Seeds thread and I create my own crosses as well, I’m under perpetual 12/12 so I can grow many small plants very fast and make lots of seeds through open pollination.
I never have to dim or move my light up or down anymore.
There’s sprouts and flowering plants right next to eachother.
This way you can also try more different cultivars and find the ones that work for you faster.
Along with kitchenscraps I also add tree leaves, grass clippings, thistle, nettle, dandelion, … these plants all contain all the minerals necessary because of their deep taproots, and it’s all free!
Water a little bit every other day, or every day, or a lot of water once a week, it doesn’t really matter, it’s a very resilient method.
After this harvest you can start your new plants + companioncrops in smaller pots which you then simply park on top of the big pots you’re using now. The roots will easily grow through the holes, or you can use a wide short piece of pipe. Then you can start mulching with kitchenscraps and go for a walk in nature with a bag and collect some organic material.
It’s been working great for me for a few harvests now, plants never show any deficiency anymore apart from natural senescense at the end of flowering.
And the soil never gets too hot because I only add fresh organic matter so it’s all slow release.
There’s entire civilizations of insects in there that rise and fall in their own cycles, even with fungus gnats, aphids and thrips, they never take over completely, now and then a few pop up and nibble on some of the lower leaves but the plants couldn’t care less and just keep on growing and growing.
When you find a good watering rhythm that works for your climate then it will smell like a forest.
If it smells bad then it’s a sign of overwatering and/or not enough diversity in your mulching.