ROOTING GELS VS. POWDERS
Using Gel As A Carrier For Rooting hormones Is A Very Bad Idea
Rooting Gels – set up favorable conditions for root rot, ( area of high moisture, low oxygen) they also contain preservatives that inhibit root growth. If you are not getting explosive roots within 7-10 days under normal circumstances, try rooting some cuttings without using anything along side of ones with the rooting gel. In most cases you will find that the ones using nothing will root much better because the gel inhibits oxygen which inhibits plant growth and sets the stage for root rot.
Gels also have added preservatives for shelf life that will inhibit plant growth. Without the added preservatives the jar of rooting gel would turn into a mass of mold and bacteria within weeks. It’s the exact same conditions as a petrie dish where you grow bacteria in a lab.
The most effective rooting hormones are powdered. Rooting gels were created only for the hydroponic store market. Many claims without any real scientific data or efficacy testing to back it up. They can manufacture registered products with a hormone percentage but there are no tests for the effectiveness of the product combined with it’s carriers, additives and preservatives. It is only distributed on a label guarantee of analysis for hormone strength. Commercial and professional greenhouse operations always use rooting powders. Conclusion – using any gel as a carrier for rooting hormone is a very bad idea.