For softwood cuttings use Stim Root 1 – 0.1% Indole-3-butyric acid or IBA, ideal for softwood cuttings and easy to propagate plants. Stim-Root #1 has been proven to aid in the rooting of softwood cuttings such as geraniums, African violets, chrysanthemum, impatiens, etc.
For medium cuttings use Stim Root 2 Indole-3-butyric acid IBA 0.4%. Stim-Root 2 has been proven to aid in the rooting of semi-hardwood cuttings such as summer flowering shrubs, woody houseplants, Hoya etc. A semi-hardwood cutting may be defined as a cutting that requires secateurs or pruners to cut, without having yet developed bark.
Use Stim Root 3 – 0.8% Indole-3-butyric acid IBA for harder/woodier cuttings. Stim-Root #3 is especially formulated to encourage quick establishment of roots on hardwood plants. Like other rooting hormones, will not make roots grow but enhances the plants ability to produce roots.