Skunk Baxter
Well-Known Member
I've done it hundreds of times, and never had a problem. When I'm doing an outdoor guerilla grow, I start 'em out in cubes and then take an Igloo cooler full of cubes out to the woods and plant them. Works great. Right now I'm doing an indoor grow with coco where I planted 50 seeds in cubes and then transplanted them all into pots of coco. Working very nicely.
Like you, I've occasionally been concerned about the differences in the water retention characteristics of the two grow mediums, but keep in mind - within a few days after you transplant the cubes into the soil, the roots are usually growing out of the rockwool and into the soil, and within a week and a half to two weeks you'll have a solid rootball established in the pot of soil. The rockwool won't even be a factor; at that point, the two growing mediums will find a rough equilibrium in their moisture retention. Not perfect (one will usually be somewhat wetter than the other) but it'll be close enough that it shouldn't matter.
Like you, I've occasionally been concerned about the differences in the water retention characteristics of the two grow mediums, but keep in mind - within a few days after you transplant the cubes into the soil, the roots are usually growing out of the rockwool and into the soil, and within a week and a half to two weeks you'll have a solid rootball established in the pot of soil. The rockwool won't even be a factor; at that point, the two growing mediums will find a rough equilibrium in their moisture retention. Not perfect (one will usually be somewhat wetter than the other) but it'll be close enough that it shouldn't matter.