How should I choose Mills Ultimate PK?

Mills Ultimate PK should be matched to your growing media, water source, crop stage, feeding style, and pH/EC monitoring plan. Choose the exact size or variant before adding to cart. This page has 6 purchasable options, and price, stock, weight, and dimensions can change by size.

Can Mills Ultimate PK ship in the United States?

Toledo Indoor Garden ships eligible products within the United States. Available shipping options, rates, and estimated delivery timing are calculated during checkout from the selected cart and destination address.

What sizes does Mills Ultimate PK come in?

Mills Ultimate PK is available in 6 options: 1 Liter, 5 Liter, 10 Liter, 20 Liter, 60 Liter. Select your preferred size on the product page to see pricing and availability.

What is the return policy for Mills products?

Toledo Indoor Garden accepts returns within 30 days on unused, unopened Mills products in original packaging. Contact us for return authorization before mailing a return; customer-paid return shipping applies unless the item arrived damaged or defective.

Mills Ultimate PK

SKU: MILULPK10L

Size: 10 Liter

$550.00

Available to Order (66 available)

Inventory may be in-store or supplier warehouse. Call 419-725-2450 to confirm availability, handling timing, or shipping.

Questions? Call 419-725-2450

Quick answer

Mills Ultimate PK should be matched to your growing media, water source, crop stage, feeding style, and pH/EC monitoring plan.

Best fitGrowers building a nutrient program around a specific media type, water source, and crop stage.

Check before orderingChoose the exact size or variant before adding to cart. This page has 6 purchasable options, and price, stock, weight, and dimensions can change by size.

Grower tipStart from the label or feed chart, measure pH and EC, and increase strength only after plants show they are handling it.

Shopping guidance from Toledo Indoor Garden. Prices, availability, shipping rates, weights, and dimensions are verified during checkout.

Mills Ultimate PK USE FOR LARGER FLOWERS & FRUITS WITH INCREASED OIL AND TERPENE PRODUCTION.

Ultimate PK is a unique phosphite-based bloom supplement, designed to be used in the last 2-4 weeks of the bloom stage.

The superior composition of Ultimate PK provides the plant with all the nutrients needed during ripening to support abundant fruit sets, harder cell structure and the best possible flavor and aroma.

Phosphite is an extremely bioavailable form of phosphate that promotes vigorous root systems and helps ensure proper nutrient uptake and optimum plant growth late in the bloom cycle.

Ultimate PK supports essential oil and terpene production, resulting in larger, harder flowers with incredible natural aromas. 2 lbs.

Weight: 24.2 lbs.

Dimensions: 24 x 18 x 12 in.

Available sizes: 1 Liter, 5 Liter, 10 Liter, 20 Liter, 60 Liter, 200 Liter.

Bloom Booster
Suitable for All Stages
Application: 8 ml per gallon last 2–4 weeks of bloom (discontinue C4 when introduced)
Genuine Mills product
Brand: Mills
Category: Nutrients & Fertilizers > Bloom Boosters

SKUMILULPK10L

BrandMills

UPC8720053704350

Weight24.2 lbs

Dimensions24 x 18 x 12 in

TypeBloom Booster

Growth StageAll Stages

NPK0-7-6

Application Rate8 ml per gallon last 2–4 weeks of bloom (discontinue C4 when introduced)

IngredientsPhosphite-based phosphorus, potassium

CategoryBloom Boosters

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Mills Ultimate PK

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