I hope you used some sort of rooting hormone...roottone, clonex,willow branch water, w/e. Give it 24/7 soft flouro light and (typically) should throw roots in 10-14 daze. There are other strains that can take alot longer, but that is purely anecdotal from other growers. IME and practice, the sucker shoots (lowest branches) contains the most amount of B1 which triggers the rooting hormone. This is because in nature, the bottom branches reach the ground and throw roots at the growth node, aiding the air layering means of propagation.