Cyco - Platinum Series Grow XL - Vegetative Growth Stimulant for Bigger Frames
Best for: growers who want to push more vigorous vegetative growth before switching to flower.
Our thoughts
This is an additive, not a base feed, so don't expect it to replace your Grow or Bloom nutrient. It's the kind of bottle that earns its place in the cupboard for growers already running a structured Cyco feed and looking to build a bigger, more productive frame before flip. If you're new to additives, get your base feed dialled in first and add this in once you've got that routine down.
Grow XL is a concentrated growth stimulant from Cyco's Platinum Series, designed to be dosed alongside your regular base nutrients during the vegetative stage. Rather than supplying core NPK like a base feed does, it's formulated to support faster growth rate and stronger biomass development, giving plants a bigger, more established structure to carry into flowering.
It's used as a supplement to an existing feeding programme, typically Cyco's own Grow and Bloom or Commercial Series base nutrients, rather than as a standalone product.
How it compares
Grow XL sits in the vegetative growth-stimulant category alongside other well-known additives.
- House & Garden Root Excelurator is a widely used vegetative-stage stimulant that growers often compare it against, though the two take different approaches to supporting growth.
- Canna Rhizotonic is another established name in this category, more root-focused but used at the same growth stage.
- Advanced Nutrients' vegetative boosters occupy similar shelf space for growers building out a full additive stack.
As with most additives in this category, the value is in consistent use through veg rather than a single dose, so budget for it as part of a full grow cycle rather than a one-off top-up.
Usage guidance
Add it into your existing veg-stage watering routine rather than using it in isolation.
When to use it
Introduce Grow XL during the vegetative stage, alongside your base Grow or Bloom nutrient, and stop dosing as you move into flower.
Dosing
Follow the dose rate and feed chart printed on the bottle or Cyco's own feeding schedule for your specific base nutrient line, since rates are tuned to work alongside Cyco's Platinum, Professional or Commercial series.
Consistency
Use it on every feed through veg rather than intermittently, as growth stimulants generally work best as a steady addition rather than an occasional boost.
Technical specifications
- Product type: Vegetative growth stimulant / additive
- Brand: Cyco Platinum Series
- Growth stage: Vegetative
- Used with: Cyco base nutrients (Grow/Bloom, Commercial or Platinum series)
- Application: Added to nutrient solution at every feed during veg
- Format: Liquid concentrate
- Suitable systems: Hydroponic, coco and soil setups
- Pack sizes: Available in multiple bottle sizes
Who this is for
- Growers already running a Cyco base feed who want to build a bigger canopy before flowering
- Anyone looking to shorten the time it takes to fill out a grow space in veg
- Growers running a structured additive stack rather than a bare-bones base feed only
Best suited to growers who already have a base nutrient routine dialled in and are ready to layer on a dedicated growth additive.
Our take
Grow XL is a straightforward way to add more push to the vegetative stage without changing your whole feeding programme. It's not a magic bullet on its own, but as part of a full Cyco routine it does what a growth stimulant is meant to do.
One we sell a lot of for growers stepping up from a bare-bones base feed. Worth picking up if you're building out your additive line-up this cycle.
