Liquid kelp fertilizer contains over 70 minerals. More important, it's an excellent source of cytokinins and auxins, both plant growth hormones.
It also contains vitamins, natural chelating agents, and amino acids. It is most economically purchased in a concentrated liquid organic fertilizer form, where a little goes a long way.
This is one of the least expensive, yet highly beneficial liquid fertilizer products out there. Liquid seaweed fertilizer is a staple in any foliar feed and is often applied with EM and other organic fertilizers.
The cytokinins improve soil tilth, regulate cell division and cell wall formation, increase photosynthesis and chlorophyll production, improve root and shoot growth, and delay senescence in the fall (when plants prepare for winter, dropping leaves, losing colour, etc.).
The auxins regulate cell elongation and mainly stimulate adventitious rooting, and promote fruit development.
The kelp used in this product is Macrocystis integrifolia, sustainably harvested here in BC and processed quickly at cool temperatures to preserve all of the benefits seaweed has to offer. It grows well over 100 feet long, as much as 2 feet per day.
Sea kelp fertilizer is mixed with water in a watering can, sprayer, or irrigation system at a rate of 1:250. It is best applied early in the morning, while evening would be the second choice. Although the application rate is very low, it is optimal, so applying more is not better.
The kelp is preferably applied in smaller, regular doses, such as monthly or bi-weekly. It is more commonly applied directly to the plants, but soil applications are beneficial, as well, especially in conjunction with effective microorganisms. Here are some application rates: