Mixtures that include up to 500 ppm NAA work well too.
Bottom heat enhances root development.
Begin applications approximately 1 week after sticking and spray weekly until transplanting. Avoid excessive misting during propagation that results in cooler media temperature, slow rooting and stretch. Consider that the water-holding capacity that is best for consumer performance may be greater than what is ideal for production. Adjust components of mix for greenhouse or field container production as appropriate. E.C. of 2.5 is optimum.