I've heard honey too. Ya don't need rooting hormone at all, it will just take a bit longer. My trick to getting near, if not 100% (besides environment) feed light, and use bloom nutes about an hour or 2 before ya take the cuts, and keep em in ph'd water a couple hours. SUPER healthy plants, or deficient plants will have hollow stems. The food shoots right up if it's the healthy case. If clones are too happy, they will take forever. I know people think the hollow stem thing could be genetic, but it's not the cass. Feeding em, and waiting will prevent a root bubble.