Fish fertilizer, also known as fish emulsion, has been the fertilizer of choice of many gardeners for decades. It is primarily made from the menhaden fish that are cooked, pressed and processed into fish meal and animal feed. The liquid portion is further processed to remove the fish oil. What's left, the fish solubles, are boiled down, given a very small dose of phosphoric acid, packaged and sold as liquid fertilizer. The resulting product is a plant food that is high in nitrogen and trace elements.
Water the potted plant or gardening bed before fertilizing. Soak it until the water runs out of the bottom of the pot or let the water puddle if it is in-ground. Allow the soil to drain completely.
Mix 1 tbsp. fish fertilizer with 1 gallon of water.
Add the solution to your choice of watering equipment. To apply the fish fertilizer to a large area use a hose-end sprayer; for potted plants a misting bottle is a good choice.
Spray the plants with the fish fertilizer. Saturate the soil beneath the plants as well.
Water again after applying fish fertilizer.