I'm gonna assume your clones have already rooted? If so, I would not suggest going from rockwool cubes directly to a 5 gallon bucket. First issue is very little of the soil in the 5 gallon bucket is being used by the roots, so it will be overkill on the watering. I personally go from a 16 oz solo cup to a 2 gallon bucket and finally a 5 gallon bucket. Can I ask what the ambient temperature in your grow box is? They do look very healthy and green though! :thumbsup:

GTD