
PHAT · Flower enhancer
Build the bud.
Set sites are just potential. PHAT is the mid-flower bulker that turns them into heavy, dense, structured buds — weeks 3 to 4 of flower, when it counts.
Australian-made · 26 years in the US · N-P-K 0.0051–0.5258–0.0143
Why it matters
Sites are potential. PHAT is weight.
The flip sets your sites; the mid-flower weeks decide how heavy they finish. PHAT drives the swell that puts on real, dense weight.
Heavy, dense bud
Turns set sites into weight, not just size.
A phosphorus-driven swell
Fuels the cell expansion that puts on bulk.
Structure, not fluff
Tightens and hardens the bud through the mid-flower window.
How PHAT works
Fill the frame.
PHAT is a biostimulant bulker — a proprietary mineral-and-organic blend, phosphorus-forward for the swell. Here is what it drives mid-flower.
Bulks the set sites Mid-flower
Turns the frame the flip set into heavy, dense bud.
Feeds the swell Phosphorus-driven
Fuels the cell expansion that puts on size and weight.
Builds density Structure
Tightens and hardens the bud — not just its size.
Weeks 3–4 Bulk stage
The window that decides how heavy the bud finishes.
What growers are seeing
Chunky. By the chop.
“The Phat charged my plants with a noticeable swell on bud size and significant frost — definitely better than my old go-to bloom booster.”
@jacksonbinan
Verified grower review · shared via Instagram

“Ultra weeks 1–2, then Phat — finishing early with major bulk.”
@greendiamondgarden_est2015
“Bloom’s Phat made this round of flower extra chunky.”
@ich
“Loving the Phat — it’s making the plants nice and lush.”
@apollos_oasis
Why growers switch
A base alone vs. the bulk.
A base feed alone
✗
Feeds maintenance, not bulk.
✗
Sites stay small through mid-flower.
✗
No phosphorus surge for the swell.
✗
Good buds — not heavy ones.
Base + PHAT
✓
A phosphorus-forward bulk surge.
✓
Sites swell into dense, structured bud.
✓
Mid-flower density, not just size.
✓
A heavier, harder finish.
A little goes a long way
1 L → 400 L
of finished feed at 2.5 ml/L — the mid-flower weeks that decide how heavy the bud finishes.
Proof — label & MSDS
Straight off the label.
N – P – K
0.0051 · 0.5258 · 0.0143
Type
Flower enhancer
Dose
2.5 ml/L
Made in
Australia
Proprietary mineral + organic blend
100% biodegradable
pH 8–10
By Agricultural Organics, South Australia
N-P-K from the product label. Composition and properties from the manufacturer MSDS.
When to use it
Mid-flower. Weeks 3 to 4.
Veg
Flip
Bulk wk 3–4
Late flower
Flush
Weeks 3–4 of flower, every feed2.5 ml/L
Soil / coco / hydroany medium
Hand from ULTRA, into OOZEthen finish
Fill the frame.
Bank the weight.
Shop PHAT →
Or DM FEED CHART to @bloom_crew_nate for your full feed schedule.