Growing Organically Since 2009
Thank you for your support! -- Article of the Week: John Kempf on Foliar Fertilizing, via the Acres U.S.A. "From the Soil Up" Newsletter
Liquid kelp fertilizer contains over 70 trace minerals. More importantly, it's an excellent source of cytokinins and auxins, two essential plant growth hormones. It also contains vitamins, natural chelating agents, and amino acids. The gentle N-P-K values of 0.1-0.5-1.0 mean this is one of the natural, whole-food, broad spectrum fertilizers so essential to the soil food web.
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.).
Auxins regulate cell elongation and mainly stimulate adventitious rooting, and promote fruit development.
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. It is particularly useful when seeding and propagating, dividing, and transplanting. Growers of wheatgrass and microgreens swear by it.
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.
How much do you need? This product, called Kelpgrow, is amazingly effective at very small doses. All you need for lawns and gardens is 20mL (four teaspoons!) per 1,000 square feet. That's the lowest amount of all of the liquid fertilizers I offer.
The product is highly concentrated, and should be diluted at a rate of 1:250 with water, whether you treat soil or containers, spray leaves, or soak seeds overnight.
This means one teaspoon (4-5mL) of Kelpgrow, diluted in one liter of water, is good for 200-250 square feet. One liter of kelp, diluted in 250 liters of water, covers 50,000 sq ft -- that's more than an acre! Two liters of kelp in 500 liters of water cover a hectare.
In the home garden and for houseplants, don't worry too much about the square footage. Just mix one teaspoon into one liter, water as usual, and spray till leaves are dripping wet. A little goes a long way.
The kelp is preferably applied in small, regular doses, such as monthly or every two weeks. It is more commonly applied directly to the plants, but soil applications are beneficial as well, especially in conjunction with effective microorganisms.
Apply Kelpgrow using a watering can, sprayer, or irrigation system. 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.
How long does it keep? Liquid kelp fertilizer is good for at least one year if kept out of direct sunlight, with the cap on tight, and stored at cool room temperature. Mix and use only what you want to apply the same day. Diluted mixed product does not keep long.