How should I choose Mills C4?

Mills C4 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 C4 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 C4 come in?

Mills C4 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 C4

SKU: MILC410L

Size: 10 Liter

$550.00

Available to Order (159 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 C4 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 C4 USE FOR ABUNDANT FLOWERING SITES/FRUIT SETS.

C4 is a flowering booster and activator which contains a complex mix of macronutrients, protein hydrolysate, humate, seaweed extract.

C4 has been developed with organic and mineral elements to support abundant flower sites and fruit sets.

The sophisticated blend of phosphorous compounds, macro nutrients, seaweed, protein carbohydrates, and trace minerals contained in C4 guarantees the grower heavier, higher volume yields.

Additionally, the potent nutrients in C4 cause the plant to produce massive amounts of sugars and essential oils. 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.

Seaweed Extract
Suitable for Bloom
Application: 4–8 ml per gallon from week 2 through week 6 of bloom
Genuine Mills product
Brand: Mills
Category: Nutrients & Fertilizers > Base Nutrients

SKUMILC410L

BrandMills

UPC8720053704299

Weight24.2 lbs

Dimensions24 x 18 x 12 in

TypeSeaweed Extract

Growth StageBloom

Ingredientsa complex mix of macronutrients, protein hydrolysate, humate, seaweed extract

NPK0.7-3-3

Application Rate4–8 ml per gallon from week 2 through week 6 of bloom

FeaturesOrganic

CategoryBase Nutrients

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Mills C4

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