... Professional factory 3. Soil conditioner,drip irrigation,foliar spraying Seaweed fertilizer is extracted from natural swaweed ( kelp, laminaria japonica, kombu). ... mixed with other fertilizer to get organic fertilizer with high efficiency and long lasting 4. Seaweed fertilizer could be mixed ... get compound with high efficiency and durability. 5. Seaweed fertilizer is easier to use, safety. So it is ...