White paper 04 · PHAT · Grower proof series
Size, and the
frost with it
Bloom PHAT is the bulking half of Bloom’s flower pair. Where growers talk about OOZE for oil and smell, they talk about PHAT for size: bud swell, chunk, weight on the branch.
Reading time ~4 minutes · Label figures transcribed from the product labels · Sources listed at the end · October 2026
The product
The bulk half of the pair
Growers describe PHAT and OOZE doing two different jobs, and plenty run both in sequence. One grower runs it in a deliberate order: Ultra through the stretch, then PHAT into bulk.
Like the rest of the range it’s an additive over your base feed, not a base itself.
20+
Growers with a PHAT quote on record · counted 30 Oct 2026
Wks 3–4
Timing · of flower, every feed
2.5
Rate · ml per litre
What’s actually different
Three things worth knowing
Half a pair
The growers getting the most out of PHAT are running OOZE after it. On its own it’s a booster; with OOZE it’s a flower program.
It sits early in flower
Weeks 3–4, after the stretch, then OOZE in weeks 5–8.
No organic certification claim
Made from Laminaria and Lessonia kelp, with boric acid and sodium molybdate for boron and molybdenum. Not USDA-certified organic.
Worth knowing. Growers describe bigger, chunkier flower, but nobody has weighed a harvest yet. Dry weight from a single grower would be worth more than the next five quotes, and we’re asking for it.
What growers are reporting
In their own words
Quotes come from Bloom’s grower review records. Some are lightly trimmed for length and spelling, with the meaning unchanged; the original messages are on file. Growers in the trial program agreed to their feedback being shared.
“The Phat charged my plants with a noticeable swell on bud size and significant frost.”
@jacksonbinan
Phat · 8 Aug 2025
“Bloom’s Phat made this round of flower extra chunky.”
@ich
Phat · 10 Sep 2025
“Used Ultra weeks 1–2, switched to Phat weeks 3–4, and these plants are finishing early with major bulk.”
@greendiamondgarden_est2015
Ultra · Phat · Ooze · 28 Dec 2025
“Got the branches snapping over the top, heavy from the weight. When y’all say ‘Phat’, ya mean it.”
@thehouseitsgreen
Phat · trial group, 2026
“Everything’s greasy in the tent, from Ooze to Phat to the Sweetener. Week 7 and the buds are so heavy the branches are falling everywhere.”
@stillstanding_10
Ooze · Phat · SWTNR · 1 Apr 2026
“Loving the Phat so far, it’s making the plants nice and lush.”
@apollos_oasis
Phat · 7 Jan 2026
The numbers
What’s on the label
Guaranteed analysis is the figure printed on the product label, not a marketing claim. Rates are Bloom’s standard schedule.
PHAT
Guaranteed analysis 0.0051-0.5258-0.0143
Total Nitrogen (N)
0.0051% (0.0017% nitrate, 0.0006% ammoniacal, 0.0028% water-soluble organic)
Available Phosphate (P₂O₅)
0.5258%
Soluble Potash (K₂O)
0.0143%
Boron (B) · Molybdenum (Mo)
0.1555% · 0.054%
Derived from
Laminaria japonica, Lessonia nigrescens, boric acid, sodium molybdate
Also contains (non plant food)
0.075% humic acid (from leonardite), 0.054% thiamine hydrochloride (vitamin B1)
Rate
2.5 ml per litre every feed, weeks 3–4 of flower
OOZE
Guaranteed analysis 0.306-2.337-2.4573
Total Nitrogen (N)
0.306% (0.0323% ammoniacal, 0.2737% water-soluble organic)
Available Phosphate (P₂O₅)
2.337%
Soluble Potash (K₂O)
2.4573%
Boron (B) · Molybdenum (Mo)
0.16% · 0.0578%
Derived from
Molasses, Ahnfeltia plicata, Laminaria japonica, boric acid, sodium molybdate
Also contains (non plant food)
0.075% humic acid (from leonardite), 0.054% thiamine hydrochloride (vitamin B1)
Rate
2.5 ml per litre every feed, weeks 5–8 of flower
What we can stand behind
Sourced, or it isn’t here
20+ growers have a PHAT quote on record.
Source: Bloom grower review records, counted 30 Oct 2026
Standard timing: PHAT weeks 3–4 of flower, OOZE weeks 5–8.
Source: Bloom feed schedule
Made in Australia by Agricultural Organics; sold in the US for 26 years.
Source: Product labels and Agricultural Organics company history
Sell it as a pair
PHAT and OOZE together are a flower program, and that’s how the growers with the best results run them.
See every grower review →Talk to Nate directly: nathan@bloomyellowbottles.com · (970) 556-1678 · bloomyellowbottles.us · @bloomyellowbottles · @bloom_crew_nate
Sources
- Bloom grower review records, counted 30 Oct 2026 — 20+ growers have a PHAT quote on record.
- Bloom feed schedule — Standard timing: PHAT weeks 3–4 of flower, OOZE weeks 5–8.
- Product labels and Agricultural Organics company history — Made in Australia by Agricultural Organics; sold in the US for 26 years.