Quick Answer

Liquid seaweed extract, NPK 0-0-0.2, a bio stimulant rather than a feeding product.
Runs at 2ml per litre through the full Grow A&B veg schedule, dropping to 1ml per litre through the full Bloom A&B flowering schedule.
Supports root activity and stress recovery, not a source of nitrogen, phosphorus or potassium.
Suits hydroponic, coco and soil systems, used across the entire crop cycle.
Sizes: 1L, 5L, 20L, with 200L and 1000L available for commercial orders.

Same high grade inputs as the more expensive imported brands, manufactured right here in Australia, without the import price tag.

Seaweed extract carries natural growth compounds and trace organic material that a plant's own root and stress response systems can draw on, distinct from feeding it nitrogen, phosphorus or potassium directly. PCS Seaweed introduces that material into the root zone at every feed, supporting the plant's own biological processes rather than adding to the mineral load already coming from the base nutrient.

The practical effect shows up most clearly under pressure. A plant that has been receiving seaweed extract consistently tends to recover faster from the kind of stress every grow eventually hits, a transplant, a heat spike, a day the reservoir temperature got away from you, because those root and stress response systems have had ongoing support rather than nothing until a problem appears. Running it across the entire cycle rather than just during a crisis is what keeps that support in place before it is actually needed.

How to Use

2ml per litre across the full six week Grow A&B veg schedule, then 1ml per litre across the full eight week Bloom A&B flowering schedule. Add alongside your base nutrient rather than as a separate mixing step, there is nothing in this formula that needs to go in before or after anything else in the reservoir.

Suitable For

Hydroponic, coco and soil systems, run across the entire crop cycle rather than a single stage.

Frequently Bought Together

PCS Grow A & B, the base nutrient Seaweed runs alongside from week 1 of the feed guide.
PCS Fulvic, another full cycle additive, working on nutrient transport rather than root stress resistance.
PCS Enzyme, a different root zone job, organic matter breakdown rather than a seaweed derived stimulant.

Frequently Asked Questions

Does PCS Seaweed replace a base nutrient?

No. It carries almost no NPK content and is not designed to feed a crop on its own. It supports the plant's own root and stress response systems and runs alongside a base nutrient like Grow A&B or Bloom A&B, not in place of one.

Can I use PCS Seaweed for the full crop cycle?

Yes. Per the feed guide it runs at 2ml per litre through the full veg schedule and 1ml per litre through the full flowering schedule, rather than being limited to one stage. Running it continuously keeps that stress support in place before a problem actually arises.