Dyna-Gro K-L-N Rooting Concentrate 1 GalDyna Gro's K L N Concentrate is a hormone and nutrient solution proven to promote vigorous root development on cuttings, transplants, bare root stock and newly potted plants. If you are worried about the spread of disease when propagating, then K L N Concentrate is the simple answer. No mixing or dipping is necessary. K L N Concentrate can be easily applied after cuttings are stuck through an injector, sprayer or added to a reservoir. Save time, money