House and Garden Algen Extract is a concentrated solution of Norwegian Sea Kelp (Ascophyllum nodosum). Plants in all phases of growth love kelp for the many benefits it provides. Micro nutrients, micro-biology and macro-nutrients are all present in Algen Extract. Algen Extract growth stimulator is a product designed for use with sprouts that have rooted well. It ensures better leaf color and stimulates the formation of root hairs, leading to increased uptake of various trace elements. Great for a foliar spray as well as root applications. It can also be used as a leaf wash in case of chemical pest control and dusting. This is a new formula of Algen Extract which much more concentrated than the original formula.