Dirtbag
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I’ll forever find Unislabs fascinating. One could imagine how such a thing could aid in growing plants in spaceships. How much water at a time at most do they fill up with? This question maybe isn’t even applicable. My soil intuition says they’d be sitting in standing water but that’s not necessarily the case. It’s like this half hydro half soilless mind fuck. Do you ever have plants that develop inefficient root systems because of Mother Nature and thus end up being in an overwatered state per se?
I'm not sure how these would do without gravity lol. But I believe they hold about 1.5L of water or so before they begin to drain.
As for overwatering it can happen if you plant an underdeveloped root system Into too much rockwool, it can stay too wet and the roots don't explore. That's more of a problem with the large blocks like Hugo's than Unislabs though. 3" block on slab results in an amazing root system since it fully roots the small 3" block first, and when you place it on the slab the main root ball and stem crown is now elevated above the main water table so it naturally stays oxygenated enough and then the roots can explore out the bottom into the slab. The roots basically take over the whole bottom layer of the unislab, I'll post some pics of the roots when I have better phone reception.