Three or four plants
Three or four plants if your growing them big (outdoors ), eight if your growing fast and flowering early ( under lights ). When the roots grow from the bottem or sides of the Rockwool block it's ready to transplant into the grow tube. Once the roots have grown from the female cannabis seeds into the mat tou can hit them with full stength hydro juice. Light proof plastic should be used to cover the top of the root chamber white side up, this is to stop green slime growing on the rockwool. This can only be done when the plant is tall enough, take care not strain or damage the plant.
