Plant Nutrients & Fertilisers

We stock two nutrient programs rather than a shelf of unrelated bottles: Athena and Green Planet. Both are complete systems — a base feed plus the additives designed to run alongside it — which matters far more than any single product in the range, because a program that was formulated together is what keeps your feed predictable from week one to flush. Alongside them sits Grow-Genius mono-silicic acid, a silicon supplement that runs with either program. Liquid and dry options throughout. Stocked in Sydney and shipped domestically.

Pick a program, then stay in it

The single most common cause of a deficiency that nobody can explain is running half of one brand's feed chart alongside half of another's. Base feeds are formulated as a complete elemental package — add a second brand's base or cal-mag on top and you are no longer feeding to any chart at all.

So the decision to make first is which program, not which bottle. After that, follow that brand's feed chart and adjust from what the plants actually show you. Standalone supplements like silica are the exception — they are designed to sit on top of whichever program you run.

Silicon — and the two very different ways to add it

Silicon is not in most base feeds, and plants growing in coco, rockwool or hydro get almost none from their water. It goes into cell walls, which is why a good supply shows up as stiffer stems and better tolerance of heat and water stress. There are two routes to it, and they behave nothing alike:

Pick one silicon source rather than stacking both. If you are already running Athena Balance for its pH-buffering job, that is your silicon. If you want silicon without touching your pH, Grow-Genius mono-silicic acid is the one.

The rest of the supporting cast

Cal-mag — Athena CaMg and Green Planet Pro Cal. Coco and reverse-osmosis water strip calcium and magnesium out of the equation, so under LED these are closer to essential than optional.

pH and correction — whichever route you take, you need a pH and EC meter to know where you actually are. A feed chart is meaningless without one.

Flush and finish — Athena Cleanse for keeping lines and media clear, Athena Fade on the Pro Line for the final weeks.

Athena IPW — stocked and sold across Australian retailers, and listed here as part of the Athena range.

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Questions we get asked

Athena or Green Planet?

Athena if you want a short product list and a feed chart you can follow without thinking about it. Green Planet if you want to tune — the additive range is far deeper and rewards a grower who likes adjusting. Neither is the better nutrient; they suit different temperaments.

Can I mix the two brands?

Not the base feeds — each is formulated as a complete elemental package, so combining them means you are following neither chart. Pick one base and stay with it. Standalone supplements such as mono-silicic acid are a different matter and run with either.

Is silica a nutrient or an additive?

An additive, or a supplement — silicon is not one of the elements a base feed is built around, which is exactly why it has to be added separately. Treat it as something you run alongside your program rather than as part of it.

Do these work in soil, or only hydro?

Both programs run in hydroponics, coco and soil — the difference is dosage and frequency, and each brand publishes a chart per medium. Soil holds nutrients and buffers pH, so it needs less and more forgivingly; coco holds almost nothing and behaves much more like hydro.

What order do I mix things in?

Potassium silicate first into plain water, then let it disperse. Cal-mag next. Then base nutrients — A before B, never poured together in concentrate. Additives after that, and pH last. Mono-silicic acid is the exception to the silica rule: Grow-Genius directs it to go in after the other nutrients, not before.

Do I need every additive in the range?

No. A base feed plus cal-mag will grow a healthy plant. Additives are there to push specific outcomes, and each one you add is another variable to diagnose when something goes wrong. Start with the base, get it stable, then add one thing at a time.

Can you ship nutrients anywhere in Australia?

Yes, all stock ships domestically from our Sydney warehouse. Liquid nutrients are heavy, so larger sizes are usually better value per litre even once freight is counted — ask us if you are weighing up sizes.