Seaweed is a fantastic fertilizer and general plant tonic. Typically derived from brown kelp (Asophyllum nodosum), seaweed supplements are known for providing potassium, phosphate, nitrogen, calcium, magnesium, trace minerals, vitamins, enzymes, carbohydrates, amino acids, and beneficial hormones. Anecdotal reports indicate that, applied at the appropriate time, it may act as a stacking agent, and so consequently produce denser flowers.

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