Plants in rockwool slabs until sexing?

[Illusion]

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

[gainesvillegreen]

That's really hard to say as it depends on a myriad of factors; however, that size rockwool would be fine for sexing plants. Even if they become rootbound, they will still show sex (they'll just stop growing in size).

[Opie Yutts]

It won't take long for the roots to poke out of a slab that size.