Sea-K Kelp Extract 1 kg organic seaweed fertilizer. 100% water soluble powder for hydroponics, drip, coco, soil, rockwool, and greenhouse systems. Over 18% soluble potassium plus Mg, Ca, Fe. Boosts vigor, flowering, color and yields. Up to 2000 gallons per bag. OMRI and EU ECOCERT organic. UK shipping only.
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