Humboldt Nutrients Sea Cal was designed in Humboldt County to be a powerful additive for hydroponics and all growing mediums. Sea Cal may be utilized for any type of vegetable, flower or herb. Sea Cal is a concentrated growth enhancer and calcium supplement that offers vital nitrogen and calcium in the ratios which are beneficial during early plant development. Calcium is very important during a plants vegetative and flowering cycle, controlling aspects of cell wall structure and permeability. Calcium is absorbed into a plant through the root tips, but plants are not always able to completely satisfy their need for calcium through their roots; foliar sprays can help in this regard. Sea Cal makes an excellent foliar spray. When sprayed on the leaf tissue, the stomata absorb the calcium with great efficiency, promoting healthy mold-free leaves.