CYCO Platinum Series Swell 1-5-3 | 55gal

Late-Flowering Phosphorus-Potassium-Magnesium Booster, 1-5-3, 55 Gallon

Later flowering stages call for a heavier phosphorus and potassium load than an early-bloom formula is built to supply. CYCO Platinum Series Swell is a 1-5-3 supplement with added magnesium, formulated to support bloom development and fruit quality as plants move deeper into the flowering cycle.

This 55 gallon drum fits commercial cultivation operations running Swell across multiple later-bloom rooms at scale.

Key Features & Benefits

• 1-5-3 guaranteed analysis with Mg 1% — supplies nitrogen, phosphorus, potassium, and magnesium for later flowering.
• Used during later flowering stages — layered onto a base bloom program as plants move past the early bloom window.
• Supports fruit quality development — the manufacturer's stated benefit tied to the potassium content of the formula.
• Mixes at 2.5ml per liter — raises reservoir ppm by roughly 200 when added to a base nutrient program.

Who Should Use Swell

This fits growers already running a bloom-stage base program who want an added phosphorus-potassium-magnesium boost as flowering progresses. On its own it only covers the later-flowering phosphorus-potassium-magnesium boost, not a complete fertilizer.

About CYCO Platinum Series Swell

CYCO Platinum Series Swell is a 1-5-3 later-flowering supplement with added magnesium, formulated to support bloom development and fruit quality, part of CYCO's Platinum Series additive lineup.

Frequently Asked Questions

What does the 1-5-3 analysis on Swell mean?

It's a guaranteed analysis of 1% nitrogen, 5% available phosphate, and 3% soluble potash, with 1% additional magnesium. It's formulated as a later-flowering additive rather than a standalone fertilizer.

When during the growth cycle should I use Swell?

CYCO recommends it for later flowering stages, once plants have moved past the early bloom window. It's not intended for vegetative growth or the earliest weeks of flowering.

How do I mix Swell into my reservoir?

CYCO calls for 2.5ml per liter, which raises reservoir ppm by roughly 200. Add it to your base bloom program rather than running it at full strength alone.

Can I combine Swell with Potash Plus?

CYCO's own guidance for Potash Plus specifically advises against combining it with Swell, though Swell's own product page doesn't repeat that restriction. Follow the caution on the Potash Plus label if you're running both products.

Do I still need my regular bloom nutrients?

Yes, Swell is a supplement rather than a complete fertilizer. Keep running your base bloom program and layer Swell on top of it during later flowering.