Purp Booster 1 Litre — Pigmentation Enhancer for Colourful Varieties
Best for: Growers with purple or colourful plant varieties wanting to unlock natural pigmentation without cold stress or environmental tricks
Our thoughts
This is a finishing touch, not a magic bullet — but if your plants have the genetics for it, Purp Booster does the job properly. Activates natural anthocyanin production to express those deep purples and reds without needing to freeze your plants or stress them out. One we recommend a lot for growers chasing colour and flavour without the faff.
Purp Booster is a liquid pigmentation enhancer designed to unlock the natural colour potential in plant varieties bred for purple and deep red hues. Rather than relying on cold nights or environmental stress to trigger pigmentation, this 0-0-1 NPK additive creates the right internal conditions for anthocyanin production — the natural flavonoid responsible for those rich violet tones — while simultaneously boosting essential oil and terpene development for improved aroma and flavour. Used as a late-bloom supplement alongside your existing nutrient schedule, it gives plants everything they need to finish strong without overloading them with unnecessary nutrients.
How it compares
Purp Booster sits in the minimal-NPK pigmentation additive category, designed as a pure finishing enhancement.
- Lower nutrient load (0-0-1) than broader bloom boosters — designed to complement, not replace, base feeds
- Focuses specifically on anthocyanin activation and terpene production rather than general flowering density
- Works stress-free — no need for temperature manipulation or plant stress to achieve colour expression
- Significantly cheaper entry point than premium pigmentation products whilst delivering the same mechanism of action
If you're comparing against products like Purpinator, the key difference is positioning: Purp Booster is the finishing touch for growers who've already dialled in their base nutrients and environment.
Usage guidance
Purp Booster is designed to work with your existing nutrient regime. Always shake well before use and add it to your solution first, stirring thoroughly before mixing in other nutrients.
Early to mid-cycle (Weeks 1–4)
1.25–4ml per litre, applied weekly or with each feed. Keep dosing conservative whilst plants are still establishing.
Late ripening (Weeks 5–8+)
5–7.5ml per litre — this is where Purp Booster does its best work. Higher dosing at the end of your growing cycle triggers maximum anthocyanin and essential oil production when plants are ready to finish.
Works with all systems
Suitable for hydroponic, coco, and soil grows. No system-specific adjustments needed.
Important: genetics matter
Purp Booster activates colour potential in varieties that have the genetics for it. If your plants aren't bred to be purple, this won't force them to turn purple — it just helps those with the genetic predisposition hit their full visual potential.
Technical specifications
- Volume: 1 litre
- NPK Ratio: 0-0-1
- Format: Liquid concentrate
- Compatibility: All grow media and systems (hydroponic, coco, soil)
- Primary function: Anthocyanin activation and essential oil/terpene enhancement
- Application: Late-bloom supplement to existing nutrient regime
Who this is for
- Growers running purple or colourful plant varieties wanting to maximise pigmentation expression
- Flavour and aroma-focused growers looking to boost essential oil and terpene production in the final weeks
- Anyone wanting natural colour development without cold night temperatures or environmental manipulation
- Experienced growers with dialled-in base nutrients looking for a finishing enhancement that doesn't overcomplicate things
- Budget-conscious growers seeking pigmentation benefits at a sensible price point
Our take
This is a proper finishing additive for growers who know what they're doing with their base nutrients and want to push colour and flavour without the stress. It doesn't reinvent the wheel — it just lets plants with the genetic potential hit their best expression.
If you've got colourful varieties in the pipeline and want to unlock that natural pigmentation without turning your grow room into a freezer, worth picking up. Does exactly what it should, and won't bloat your weekly feed costs.
