It won't take long for the roots to poke out of a slab that size.
Opie Yutts Reviewed by Opie Yutts on . Plants in rockwool slabs until sexing? I have 3"x3"x4" slabs... planning on leaving them in just rockwooll without hydroton until i switch to flowering and can eliminate the males. how long do you guys figure i can leave them in the rockwool before they become to rootbound and need to be transplanted into hydrton? thanks Rating: 5