take cuttings atleast a week before flowering so to give it time to recover,clonex is a good rooting hormone gel,use healthy branches for cuttings,i take from the middle of the stem,cut at 45 degree angle and straight into the rooting gel,remembering to cut the bottom set of leaves off close to the nodes and make sure there under the rockwool surface or soil surface,will you be rooting the cuttings in rockwool or soil??