The present invention relates to a gelatinous moisturizing substrate such as that described in U.S. Pat. No. 4,865,640 for controllably delivering water, gas micro-nutrients, plant growth additives, preservatives, and surfactants to plant tissue such as the entire vertical root system of a plant. The preferred embodiment of the present invention comprises a mixture of the following by percent weight: 97.6% water, 2.0% sodium carboxymethylcellulose, 0.15% aluminum sulfate, 0.04% sodium benzoate, 0.04% potassium sorbate, 0.237% zinc acetate, 0.00009% kinetin, 0.00004% indole-3-butyric acid, 0.00003% gibberellic acid, and 0.005% sodium sesquicarbonate. The concentrations of these nutrients disclosed in this invention maintain the substrate's viscosity. As a result, the moisturizing agent retains water, zinc, acetic acid, auxins, gibberellins, and cytokinins in the gel and releases the water and nutrients into the soil surface at a controlled rate, enabling cell growth, formation of new leaves, vigorous shoot growth, even maturity, and improved stress tolerance.
