Advanced Nutrients Big Bud Coco - PK Booster Built for Coco Growers
Best for: coco coir growers who want a PK booster that's specifically tuned to cope with coco's tendency to lock up iron and calcium.
Our thoughts
Coco is a fantastic medium, but it holds onto certain elements more stubbornly than soil or hydro, which is exactly what this version of Big Bud is built to counter. If you're growing in coco and already like the standard Big Bud formula, this is the version worth reaching for instead - same job, tuned for your medium.
Big Bud Coco takes the standard Big Bud PK-boosting formula and adapts it for coco coir, adding extra chelated iron and additional forms of calcium. Coco coir has a known tendency to bind up iron and calcium via cation exchange, which can lead to deficiencies even when your base feed contains enough of both - Big Bud Coco is formulated to help counter that specific issue while still delivering the phosphorus, potassium and amino acid boost of the standard product.
It's dosed the same way as regular Big Bud, so if you're switching from soil or hydro to coco, the dosing habit doesn't need to change - just the bottle.
How it compares
This is a medium-specific variant rather than a different category of product.
- Compared with standard Advanced Nutrients Big Bud, this version is only worth the switch if you're growing in coco coir - in soil or hydro, the standard formula is the better fit.
- Compared with Canna's coco-specific boosters, which are formulated to pair with Canna's own Coco A&B base, Big Bud Coco is designed to sit on top of any base feed rather than being tied to one brand's system.
- Compared with House & Garden's coco range, it takes a similar approach of adjusting a bloom booster for coco's mineral-holding properties rather than treating coco the same as soil.
If coco lock-up has been an issue for you before, this is a targeted fix rather than a generic upgrade.
Usage guidance
Used the same way as any liquid bloom booster.
Dosing
Add at 2ml per litre of feed water throughout the flowering phase.
Coco-specific tip
Because coco already tends to hold onto calcium and iron, keep an eye on your Cal-Mag supplementation alongside this - don't double up unnecessarily.
Compatibility
Formulated specifically for coco coir; use standard Big Bud if you're growing in soil or a hydro system.
Technical specifications
- Formulated for: coco coir specifically
- Format: liquid concentrate
- Dosage: 2ml per litre
- Use period: throughout the flowering/bloom phase
- Key additions vs standard Big Bud: extra chelated iron and additional calcium forms
- Key ingredients: phosphorus, potassium, L-amino acids, chelated iron, calcium
- Brand: Advanced Nutrients
Who this is for
- Coco coir growers wanting a PK booster tuned to their medium rather than a generic one
- Growers who've seen iron or calcium deficiency symptoms in coco before
- Anyone already using standard Big Bud who's switching their setup over to coco
Not the right pick if you're growing in soil or straight hydro - use the standard Big Bud formula instead.
Our take
This is a good example of a product doing one job properly rather than trying to be universal — it's Big Bud, adjusted specifically for the way coco behaves, rather than a generic booster with a coco label slapped on.
One we sell a lot of for new growers moving into coco for the first time and wanting to avoid the classic iron and calcium headaches.
