Cyco Potash Plus — Potassium Additive for the Flowering Phase
Best for: Indoor growers looking to strengthen plants and improve yields during the first four weeks of the reproductive growth phase
Our thoughts
If you're running a base nutrient formula and want to dial in the reproductive phase properly, Cyco Potash Plus does exactly what it should. It's a straightforward potassium additive with added calcium and magnesium — no faffing about. One we recommend a lot for growers looking to improve plant strength and flower development without overcomplicating their feed schedule.
Cyco Potash Plus is a liquid potassium supplement designed to work alongside your existing base nutrients during weeks 1–4 of the reproductive growth phase. It balances nitrogen and other key nutrients to ensure they're absorbed and used efficiently by your plants, whilst strengthening tissues and improving water retention. At just 1ml per litre, it integrates cleanly into any hydroponic setup without requiring separate micro-nutrient juggling.
How it compares
Cyco sits between pure potassium products and complete bloom formulas.
- Higher potassium concentration than base nutrients, but balanced with calcium and magnesium — not a standalone deficiency fix
- Simpler than mixing multiple supplements; one additive covers reproductive phase support
- Works as a complement to three-part systems, not a replacement
- Pharmaceutical-grade formulation ensures consistency and purity across batches
The difference: pure potassium products (like sulfate of potash) treat deficiency. Cyco Potash Plus optimises nutrient efficiency during the critical reproductive window — it's a strategic addition, not an emergency fix.
Usage guidance
Hydroponic systems
Add 1ml of Cyco Potash Plus per 1 litre of nutrient solution. Replenish at each nutrient change at the same rate. Use only during weeks 1–4 of the reproductive growth phase.
Compatibility
Works with any complete base nutrient system. Do not use in conjunction with Cyco Swell — choose one or the other for that growth stage.
What it does
Potassium acts as an enzyme activator and drives nutrient uptake efficiency. This additive also improves water retention in plant tissues, strengthens cell walls, and supports the development of larger, denser flowers. In short: stronger plants, better quality output.
Technical specifications
- NPK Ratio: 3-0-2 (Nitrogen 3%, Potassium 2%)
- Secondary Nutrients: Calcium 3%, Magnesium 0.6%
- Form: Liquid concentrate
- Dosage: 1ml per 1 litre of nutrient solution
- Solubility: Fully water-soluble
- Active Ingredients: Potassium nitrate, calcium nitrate, magnesium EDTA
- Manufacturing Standard: Pharmaceutical-grade ingredients, 1-micron filtration
- Available sizes: 1 litre, 5 litre, 20 litre
- Usage timing: Weeks 1–4 of reproductive growth phase only
Who this is for
- Hydroponic growers running General Hydroponics, Advanced Nutrients, or similar three-part base systems
- Growers transitioning from vegetative to reproductive phase who want to optimise nutrient uptake
- Indoor cultivators focused on improving plant strength and flower quality
- Anyone looking to reduce nutrient waste and improve feed efficiency
- Semi-commercial or commercial operations seeking yield consistency
Particularly well-suited to growers who already know their base nutrients and want a precision additive rather than a complete formula overhaul.
Our take
This is a proper potassium additive from a brand that knows what it's doing. The NPK profile is balanced, the dosing is straightforward, and pharmaceutical-grade manufacturing means you're getting consistency from bottle to bottle.
If you're serious about the reproductive phase and want to strengthen plants without guessing, worth picking up. Does exactly what it should, week in, week out.
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