Whats the best way to get massive roots in rockwool once nubs form

I've taken about 40 clones. Half have nubs poking from the bottom and the others seem to be on there way cause I cant pull the clone from the rockwool. No dome is being used at this point but they r still on a heat mat keeping the root zone at 80. I'm good at getting my clones to root. I just havent perfecting getting the massive root system before transplant. When I have the dome on I keep both vents open from day 1 achieving around 90% humidity at 79 degrees inside and 72 ambient. This last for 4 to 6 days then dome comes off.

sweet . Do you have pics of said clones ?
Are you putting small block on top of Big blocks ?
just asking because I usually start clones in 4" blocks and then stack on top of a 6" or 8" block .
I grow 4 to 6 plants in a 2' x 4' Flood tray .
When vegging , I use a 400 Watt light , going 24 hours a day until I get where I want them .
I then switch to a 600 Watt light going 12 / 12 .

dadio161 said:

sweet . Do you have pics of said clones ?
Are you putting small block on top of Big blocks ?
just asking because I usually start clones in 4" blocks and then stack on top of a 6" or 8" block .
I grow 4 to 6 plants in a 2' x 4' Flood tray .
When vegging , I use a 400 Watt light , going 24 hours a day until I get where I want them .
I then switch to a 600 Watt light going 12 / 12 .

Click to expand...

I will take some here in a little bit. I'm keeping the dome on but both vents are open and its resting on some neoprene collars. One under each corner to keep a 1 inch clearance. The reason I do this is my growroom is 72 degrees, which is a lil cool for root development. So with the dome partially on I can get the temps up to around 78 degrees with my heat mat, which seems ideal for my roots. I just remoistened each clone by dipping each 1.5 cube in some kln, protect, bloom nutes, elite 91 roots, and hygrozyme.