Pro Powders Seaweed 16-16 Seaweed Extract Powder - 20 lb

Water-Soluble Kelp Extract for Steady Plant Support - 20 lb Bag

Plants under stress during vegetative growth or flowering need support that fits into an existing feeding routine. This cold-processed brown seaweed extract, made from Ascophyllum nodosum, supplies alginic acid, mannitol, amino acids, potassium and naturally occurring plant hormones. The powder is 100% water soluble, so it mixes into nutrient solution without leaving residue.

The 20 lb size suits commercial growers, larger indoor rooms and automated fertigation setups that use seaweed extract regularly. Hobbyists who want to trial it can look to the smaller sizes the line is offered in.

Key Features & Benefits

• 100% water soluble — mixes into reservoirs and irrigation lines.
• Four application methods — use fertigation, foliar spray, soil drench or top watering.
• Potassium and organic matter — adds soluble potash and organic content to your program.
• Naturally occurring plant hormones — cytokinin and gibberellin at 800 ppm.
• Cold-processed extract — derived from brown seaweed.

Who Should Use Pro Powders Seaweed 16-16

Commercial cultivators, hydroponic operators and serious home gardeners who want a bulk seaweed extract to add to a complete nutrient program.

About Pro Powders Seaweed 16-16

This product is a black powder seaweed extract with a header analysis of 16% alginic acid and 16% K₂O. Its analysis lists 19.3% alginic acid, 53.2% organic matter, 2.3% amino acids, 17.2% soluble potash, 2.1% mannitol and 800 ppm cytokinin and gibberellin. It ships as one 20 lb unit.

Frequently Asked Questions

Q: How do I apply it?
A: Premix the powder into water before adding other nutrients. Then apply by fertigation, foliar spray, soil drench or top watering. Adjust pH as needed after mixing.

Q: What pH should my solution be?
A: Keep nutrient solution pH between 5.8 and 6.5. Check it after mixing and adjust if needed.

Q: Is it safe to mix with other products?
A: Run a jar test before combining it with other products. This shows whether the mix stays stable before you treat plants.

Q: What does cytokinin and gibberellin mean?
A: These are two families of plant hormones found naturally in seaweed extracts. This product lists them at 800 ppm.

Q: What precautions apply when handling it?
A: Avoid breathing dust, work in a ventilated area, and wear gloves and eye protection. It causes skin and eye irritation, so rinse with water after contact. Store it sealed in a cool, dry place away from children and pets.