Liquid Stim Root's effectiveness comes from higher concentrations of IBA, more uniform application to cuttings, and better penetration into woody cuttings. Better rooting than with powders, occurs with many hard-to-root species. The carrier used has greater potential to burn than the powder, so a trial on a small number of cuttings at different concentrations is always recommended. Liquid Stim-Root 5000 contains 2500ppm of Indule-3-butric acid.
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