Advanced Nutrients Big Bud - PK Bloom Booster for Bigger, Denser Buds
Best for: growers running any base nutrient who want a straightforward PK booster to bulk out flower size and density.
Our thoughts
Big Bud is one of the most recognised names in bloom boosters for a reason - it's a straightforward PK additive that does exactly what it's meant to do without any complicated dosing gymnastics. If you already run a base feed and want a bit more weight and density in the flowers, this is a sensible, well-proven add-in rather than a gamble on something unproven.
Big Bud is a liquid PK booster with an NPK ratio of roughly 0-1-3, weighted towards potassium because plants draw more heavily on potassium than phosphorus during bloom. It's built around phosphorus and potassium plus L-amino acids, added on top of your existing base nutrient rather than replacing any part of it.
It's dosed at a low rate - 2ml per litre of feed water - and works across hydro, coco and soil systems, so it slots into most existing feed schedules without needing to switch anything else.
How it compares
Big Bud sits in the same category as the best-known PK boosters on the market.
- Compared with Canna PK 13/14, which is dosed at a higher concentration for a shorter late-flower window, Big Bud is used across a longer stretch of the bloom phase at a lower per-litre dose.
- Compared with House & Garden Bud-XL, which targets similar density and weight gains, Big Bud is one of the more widely stocked and recognised options, which tends to keep it competitively priced.
- Compared with running no PK booster at all, adding one at this dose is a low-cost way to noticeably firm up bud structure without altering your core feed.
It's not the cheapest PK booster on the shelf, but it's one of the most trusted, and the dosing is simple enough for anyone running their first bloom booster.
Usage guidance
Straightforward to add to an existing feed.
Dosing
Add at 2ml per litre of nutrient solution throughout the flowering phase, alongside your regular base feed.
Compatibility
Works in hydroponic, coco and soil systems - no need to adjust your base nutrient ratios to use it.
Mixing order
Add to your reservoir or feed water after your base nutrients are already mixed in, then check pH before feeding.
Technical specifications
- NPK ratio: 0-1-3 (liquid formula)
- Format: liquid concentrate
- Dosage: 2ml per litre
- Use period: throughout the flowering/bloom phase
- Compatible media: hydroponics, coco coir, soil
- Key ingredients: phosphorus, potassium, L-amino acids
- Brand: Advanced Nutrients
- Sizes available: from small bottles through to bulk sizes, depending on stock
Who this is for
- Growers running a base feed who want extra bud weight and density without switching systems
- Anyone new to PK boosters looking for a well-known, simply-dosed option
- Hydro, coco and soil growers alike, since it works across all three
- Growers who want a trusted brand name over an unfamiliar budget alternative
Our take
There's a reason Big Bud has stayed a staple on grow shop shelves for years - it's a simple, one-job additive that reliably does that job. No fiddly ratios, no complicated feed charts, just a PK boost added to whatever you're already running.
Does exactly what it should, day in, day out - a solid pick if you want a proven PK booster without overthinking it.
