u/PuzzleheadedSpell790

6 inch rockwool cubes is obviously the standard for commercial growers who want to grow with rockwool and without slabs. But honestly, I keep on asking myself why there aren't more people growing with 4 inch rockwool cubes from start to finish without slabs, smaller plants but higher plant count. Especially among those who plant with multi tier racks with height constraints. I never saw anyone doing this. For sure I can imagine that they will dry out much faster with only 1 litre of volume. But considering the fact that really huge plants are being grown in 6 inch rockwool cubes....

Anyone around who does it? Or did it?