Rooting hormones sit among the cheapest upgrades in cannabis propagation, and they are among the few inputs with published cannabis-specific evidence behind them. Here is what the research actually measured, and how to think about products you will find on a shelf.
What The Research Shows
In a peer-reviewed trial on cannabis stem cuttings, IBA rooting hormone increased rooting success rate and root quality compared with cuttings that received no auxin treatment. Auxin does not create roots out of nothing; adventitious roots still initiate at the wounded basal end. The hormone raises the odds that the process starts and produces usable root systems.
Typical Dip Concentrations
Liquid IBA dips for cuttings typically run 500 to 1,000 ppm, with rates that vary by species and by product label. The label is the authority, not forum folklore: manufacturers formulate concentrates at specific strengths, and dilution math matters. More hormone is not better; overdosing can suppress rooting or callus into damage.
Leaves Matter Too
Hormone is one variable among several. The same research program found that retaining three leaves on cannabis cuttings produced higher root-quality scores than two leaves, while rooting rate itself was unaffected. Foliage feeds the cutting while roots form, provided humidity keeps water loss under control.
Gels, Liquids, And Powders
Commercial products differ mainly in carrier and concentration. Liquids allow measured dilution for dip rates in the documented range; gels and powders trade precision for convenience. Whichever format you buy, treat the stated concentration as the operative fact and match it to your crop's sensitivity rather than assuming all products interchange.
Where Rooting Fits In The Process
Rooting hormones support one stage of a longer pipeline: healthy stock plants, clean cuts, controlled humidity, and patience while adventitious roots form. Our cloning science overview covers the full sequence, and the clone care guide picks up where roots leave off.
When you are ready to put rooted genetics into a production plan, browse the Clone Source catalog. Catalog records list breeder provenance and HLVd-tested flags so you know exactly what each cutting carries before it ships.