BioBizz Top-Max – Organic Bloom Booster for Bigger, Tastier Crops
Top-Max is BioBizz’s organic bloom stimulator, designed to maximise flower size, aroma, and flavour. Made from natural leonardite (rich in fulvic and humic acids), it ramps up nutrient transport and boosts oil production — giving you sweeter, stronger-smelling fruits and flowers every time.
Just getting started with BioBizz? Grab a Starter Pack or Try Pack to begin your organic grow journey.
Please Note: The 10L bottle is purchased to order, so extended lead times will apply!
Why Use Top-Max?
- Certified organic flower booster – improves size, aroma, and flavour
- Contains humic and fulvic acids – sourced from natural leonardite
- Increases Brix levels – boosts natural sugar and oil production in plants
- Enhances nutrient uptake – helps transport key minerals to buds and blooms
- Perfect for full organic schedules – or as a PK booster alternative
How to Use BioBizz Top-Max
Use from the start of flowering until two weeks before harvest. Mix 2–5ml per litre of water. Apply at every watering during the bloom stage.
Pair with Bio-Bloom and Bio-Heaven for a powerful organic trio that replaces mineral PK boosters in weeks 4 and 6 of flower.
Mixing Tip
Never mix nutrients together in their concentrated form. Add each one separately to your water, stirring well in between.
Boost with Beneficials
- Ecothrive Neutralise – Remove chlorine from tap water to protect microbes
- Ecothrive Biosys – Add beneficial microbes and fungi to your root zone
- Ecothrive Charge – Natural insect frass to stimulate root and plant growth
Tech Specs
- Feed Schedule: 2–5ml/L during flowering, every watering
- NPK: 0.1 – 0.01 – 0.1
- For Use With: Soil, coco, or any organic grow system
We're the kings of stealth shipping! All of our orders are sent out in plain mailer bags or boxes with no mention of the company name for ultimate discretion.
Mainland UK Next Day Shipping will be with you the next day if ordered before 2pm. Our standard shipping is dispatched within 4 days.
We always aim for make sure our customers love our products, but if you do need to return an order, our 24/7 returns portal makes it incredibly easy. Just visit onestopgrowshop.co.uk/returns
Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. If you have any issues with shipping to your particular country, get in touch with customerservices@onestopgrowshop.co.uk and we'll create you a bespoke shipping quote.



