Bloom PK 1L yellow bottle, 0-19.5-21 phosphorus and potassium supplement by Bloom Advanced Floriculture

PK by Bloom — 0-19.5-21 Phosphorus and Potassium Booster for Peak Flower

BLOOM-PK-1

$29.95
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Tax included. Shipping calculated at checkout.

0-19.5-21 phosphorus and potassium booster for peak flower. 1ml per litre from around week 5 of bloom, every feed, up to the flush.

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Pairs well with

Around week 5 of flower the plant stops building frame and starts packing on weight, and that's when its appetite for phosphorus and potassium peaks. PK by Bloom is the range's dedicated PK booster for that window: a concentrated 0-19.5-21 phosphorus and potassium supplement made from phosphoric acid and potassium hydroxide, run at 1ml per litre every feed through peak flower and stopped for the final flush. It's the heavy PK hit that Phat deliberately isn't, it runs alongside Ooze, and it sits on top of your base nutrients. It's a straight mineral feed, so it adds EC: watch your runoff and back off if leaf tips start to burn. A litre makes 1,000 litres of feed.

The range's real PK hit0-19.5-21. Phat and Ooze carry small amounts of P and K; this is the bottle that delivers them in quantity.
Timed for peak flowerFrom around week 5 of bloom, when the plant's demand for phosphorus and potassium is highest.
1ml per litreA concentrated mineral feed, so a small dose does the work. A litre makes 1,000 litres of feed.
Runs alongside OozeOoze starts at week 5 too. Run both at their normal rates in Bloom's program.
Sits on top of your baseNo need to cut back your base flower nutrients. PK adds to them at peak demand.
Mineral, not biologicalNo kelp, sugars or humates. Pure phosphorus and potassium, so it plays well with any base feed.

Specifications
Brand: Bloom (Agricultural Organics)
Type: Phosphorus and potassium supplement
NPK: 0 - 19.5 - 21
Made from: Phosphoric acid and potassium hydroxide
Rate: 1ml per litre
When to use: Peak flower, from around week 5 of bloom, every feed; stop for the final flush
Yield: 1L makes 1,000L of feed at 1ml/L
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 PK at around week 5 of flower, once the frame is built and the flowers start filling out.
  • Keep your base flower nutrients at their normal rate. PK is extra phosphorus and potassium on top, not a replacement feed.
  • PK adds EC. Check your feed and runoff EC when you bring it in, and ease off if leaf tips start to burn.
  • Running Ooze as well? Both start around week 5 in Bloom's program. Run each at its normal rate.
  • Add PK with your other nutrients and adjust pH last, after everything is in.
  • Stop PK for the final flush.

How To Use It
1Shake the bottle well.
2From around week 5 of flower, add 1ml per litre to your nutrient solution alongside your base nutrients.
3Mix thoroughly, then check EC and adjust pH last.
4Feed as normal at every watering through peak flower.
5Stop PK for the final flush.

Pairs Well With

Frequently Asked Questions
When do I use Bloom PK?

At peak flower, from around week 5 of bloom, at 1ml per litre in every feed. Stop for the final flush.

Is Bloom PK the same as Phat?

No. Phat is a kelp and trace mineral enhancer with very little P or K. PK is 0-19.5-21, the range's dedicated phosphorus and potassium booster.

Can I run PK and Ooze together?

Yes. In Bloom's program both start around week 5 of flower. Run each at its normal rate.

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 PK on top rather than in place of anything.

Will PK raise my EC?

Yes. It's a concentrated mineral feed, so it lifts EC. Check feed and runoff EC when you bring it in and ease off if leaf tips burn.

Can I use it in soil or coco?

Yes. Bloom lists soil, coco and hydro, all at the same 1ml per litre.

How long does a bottle last?

A litre makes 1,000 litres of feed at 1ml per litre. The 300ml makes 300 litres.

Is it organic?

No. It's a mineral phosphorus and potassium supplement, and Bloom's range is not certified organic.

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