FloraFlex B1 Bag - Base Bloom Nutrient, Part 1 of the B1/B2 System
Best for: coco and soil growers running the FloraFlex B1/B2 base feeding system through the flowering stage.
Our thoughts
B1 is only half the story, it's designed to work alongside B2, so don't expect a complete feed from this bag alone. Used as intended, as the first part of a proper two-part base system, it does what it's meant to: get plants fed and ready for the transition into flower.
FloraFlex B1 is a granular base nutrient and the first part of FloraFlex's two-part B1/B2 bloom system. It's formulated to deliver the NPK and micronutrients plants need as they move from vegetative growth into flowering, supporting a smooth transition rather than a stalled or stressed one. It comes as a 1lb bag of dry base nutrient, mixed into your feed solution rather than used straight.
As with any two-part base system, B1 is designed to be used together with B2 to provide a complete base feed, not as a standalone product.
How it compares
Two-part dry or liquid base systems are the standard approach across most nutrient brands, and FloraFlex's B1/B2 sits in that same category.
- Where CANNA's Coco A+B is a liquid two-part system, FloraFlex B1/B2 is a granular, dry-mix alternative aimed at the same goal, a complete base feed split across two complementary products.
- Compared to Advanced Nutrients' pH Perfect Grow/Micro/Bloom three-part range, FloraFlex simplifies things down to two parts rather than three.
- Against House & Garden's Cocos A+B, another two-part liquid base, FloraFlex's dry format can be easier to store and has a longer shelf life before mixing.
You're choosing a dry two-part base over the more common liquid A+B systems, which some growers prefer for storage and shelf-life reasons.
Usage guidance
Always use B1 alongside B2 rather than on its own for a complete feed.
Mixing
Dissolve into your feed water following the FloraFlex feed chart for your reservoir size, alongside the matching dose of B2.
Dose rates
Follow the manufacturer's feed schedule and adjust based on your EC readings rather than eyeballing quantities.
Timing
Introduce as your plants move from late veg into the flowering stage, continuing through the bloom cycle alongside B2.
Technical specifications
- Format: Granular base nutrient
- Pack size: 1lb (approx. 454g)
- System role: Part 1 of the B1/B2 two-part base system
- Application stage: Veg-to-flower transition through bloom
- Used with: FloraFlex B2
- Brand: FloraFlex
Who this is for
- Coco and soil growers already committed to the FloraFlex feeding system
- Growers switching from a liquid two-part base to a dry alternative
- Anyone wanting a simplified two-part rather than three-part base nutrient routine
Only makes sense bought together with B2, since the two are designed as a matched pair.
Our take
B1 does exactly what a base nutrient part one should, setting plants up for a clean move into flower, provided you're running it with B2 as intended. It's a solid, no-nonsense option for growers already in the FloraFlex ecosystem.
Worth picking up alongside B2 if you're building out a FloraFlex feeding routine.
