Bloom Phat 1L yellow bottle, kelp and mineral flower enhancer by Bloom Advanced Floriculture

Phat by Bloom — Kelp and Mineral Flower Enhancer for Weeks 3–4 of Bloom

BLOOM-PHAT-1

$59.95
/
Tax included. Shipping calculated at checkout.

Kelp-based flower enhancer for weeks 3–4 of bloom. 2.5ml per litre for denser, heavier flowers.

Size
  • Handpicked by growers
  • Ships today
  • Real advice, real people
  • 5,000+ high yielding customers
  • 30-day returns*
  • Free shipping over $499*
  • Low stock - 5 items left
  • Backordered, shipping soon

Pairs well with

Weeks 3 and 4 of flower are when the sites you set at the transition start turning into size. Phat by Bloom is the flower enhancer for that window: two brown kelps with boron, molybdenum and humic acid, run at 2.5ml per litre to push the plant toward denser, heavier flowers rather than airy growth. It picks up where Ultra leaves off and hands over to Ooze from week 5, and it runs on top of your base nutrients. It's not a PK booster: at well under 1% phosphorus it supports the swell rather than feeding it, so keep your base flower feed at full strength. A litre makes 400 litres of feed.

Built for the bulk windowWeeks 3–4 of flower, when set sites start putting on size and weight.
Density, not fluffAimed at tighter, heavier flowers through mid-bloom rather than open, airy growth.
Two kelps plus trace mineralsLaminaria japonica and Lessonia nigrescens kelps with boron, molybdenum and humic acid.
Slots between Ultra and OozeBloom's flower sequence: Ultra in weeks 1–2, Phat in weeks 3–4, Ooze from week 5.
Sits on top of your baseNo need to cut back your base nutrients. Phat is an additive, not a replacement feed.
1 litre makes 400 litresAt 2.5ml per litre, the 300ml bottle covers a small tent and the drums cover a room.

Specifications
Brand: Bloom (Agricultural Organics)
Type: Flower enhancer
NPK: 0.0051 - 0.5258 - 0.0143
Key inputs: Laminaria japonica kelp, Lessonia nigrescens kelp, boric acid, sodium molybdate, humic acid (leonardite), vitamin B1
Rate: 2.5ml per litre
When to use: Weeks 3–4 of flower, every feed
Yield: 1L makes 400L of feed at 2.5ml/L
Concentrate pH: 8–10 (alkaline)
Suits: Soil, coco, recirculating hydro, run-to-waste
Sizes: 300ml, 1L, 2.5L, 15L, 25L
Made in: South Australia
Biodegradable: Yes, 100% (manufacturer)

Grower's Tip
  • Start Phat in week 3 of flower, straight after Ultra finishes. The timing is what makes it work.
  • Keep your base flower nutrients at their normal rate. Phat adds to them, it doesn't stand in for them.
  • Hand over to Ooze in week 5. Running Phat past its window doesn't add anything.
  • Add Phat with your other nutrients and adjust pH last. The concentrate is alkaline.
  • Shake well before use. Colour and consistency vary a little between batches, which is normal.
  • Watch your EC as you stack additives in mid-bloom, and back off if leaf tips start to burn.

How To Use It
1Shake the bottle well.
2From week 3 of flower, add 2.5ml per litre to your nutrient solution alongside your base nutrients.
3Mix thoroughly, then check and adjust pH last.
4Feed as normal at every watering through weeks 3–4 of flower.
5From week 5, stop Phat and move on to Ooze.

Want to see it explained first? Watch Bloom's Phat product video on YouTube.

Pairs Well With

Frequently Asked Questions
When do I use Phat?

Weeks 3–4 of flower at 2.5ml per litre, every feed. It follows Ultra and hands over to Ooze in week 5.

Is Phat a PK booster?

No. Its NPK is 0.0051-0.5258-0.0143, so it carries very little phosphorus or potassium. It's a kelp and trace mineral flower enhancer. PK by Bloom is the range's PK booster.

Can I use Phat without Ultra and Ooze?

Yes. Each Bloom additive works on its own. The full sequence is how Bloom designs the program, not a requirement.

Do I need to cut back my base nutrients?

No. Bloom designs its additives to run alongside your base feed at its normal rate, so you add Phat on top rather than in place of anything.

Does Phat affect pH?

It can. The concentrate is alkaline (pH 8–10), so add it with your nutrients and adjust pH last.

Can I use it in soil or coco?

Yes. Bloom lists soil, coco and hydro, all at the same 2.5ml per litre.

How long does a bottle last?

A litre makes 400 litres of feed at 2.5ml per litre. The 300ml makes 120 litres.

Is it certified organic?

No. Bloom makes the range mostly from organic sources, but the products are not certified organic, so we don't sell them as organic.

Select Size

Turn Set Sites Into Weight

Free shipping over $499* on bottles up to 2.5L. 15L and 25L drums ship at freight rates.

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

Growers First, Retailers Second

Welcome to The Grow Guys

We built The Grow Guys from the soil up — well, coco and perlite. Before we sold gear, we bought it, ran it, and learned the hard way what's worth the money and what ends up in the shed. That's the filter everything on our shelves passes through. No sales scripts, no rebadged junk, no telling you what you want to hear. Just gear we'd run ourselves and advice from people who actually grow. Chasing higher yields, tighter flowers, or your first harvest? You're in the right place.

Meet The Grow Guys

FAQs

Order by 2pm and it ships the same business day from Invermay, Tasmania.

Calculated at checkout by weight and destination. Free shipping over $499*.

Plain packaging, no branding. No one knows what's in your box.

30-day change-of-mind returns on unopened, unused products. A 10% restocking fee applies and return shipping is at your cost.

Call, email, or walk into the Invermay shop. You'll get a grower on the other end, not a script.

Unit 10/110 Gleadow Street, Invermay 7248. Mon–Fri 8:30am–5:30pm, Sat 9am–3pm.

You may also like

Recently viewed

Back to Hydroponic Additives