Seaweed extract is made by extracting and refining marine biological seaweed. It is rich in 18 kinds of protein and amino acids that can be directly absorbed and utilized by plants, and plant growth regulators that have significant effects on plant physiological processes (Auxins, cytokinins, gibberellins, etc.), alginic acid, humic acid, vitamins, nucleotides, plant stress resistance factors and essential elements for plant growth: nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, copper, zinc, molybdenum, boron, etc. All of these biologically active substances are extracted from seaweed, without pungent chemical odor, slightly seaweed smell, and no residue.