ok, i've no experience with rockwool and I wanted advice from people with experience instead of just reading information and going by what I read...thanks creeder
I moved my seedlings out 2 weeks after planting the seeds ... they were just over 2" and 4 small leaves not including the feeder leaves .... the roots at that point were coming out the bottom of the RW and staring to go through the tray ... 1 week ago I put them in my hydro web baskets and started feeding them....so I really wouldn't go much past 2 weeks from experience pics of seedlings and today below