Skip to product information
1 of 3

MILLS C4

Regular price
$90.00
Regular price
Sale price
$90.00
Tax included.

A-Grade Rewards Program

Size
FAQ

Q. What is MILLS C4 used for?

MILLS C4 is a flowering additive designed to enhance flower formation, support essential oil production and improve overall bloom quality.

Q. When should I use MILLS C4?

MILLS C4 is developed for use during the primordial and pistillate stages of flowering.

Q. What does MILLS C4 contain?

It contains fulvic acids, bio-stimulants, micro-elements, trace minerals and carbohydrates.

Q. Can MILLS C4 be used with other MILLS products?

Yes. Around week 5 of flowering, it can be paired with MILLS ULTIMATE PK to support improved flower structure and finish.

Q. What stage of growth is MILLS C4 designed for?

MILLS C4 is specifically formulated for the blooming phase of plant growth.

WHAT IS THE NPK?

The NPK of Mills C4 is 0.7-3-3

Mills C4 1L bloom enhancer. Flowering booster for hydroponics, soil and coco to increase flower size and heavier yields.
Mills C4 5L bloom enhancer. Flowering booster for hydroponics, soil and coco to increase flower size and heavier yields.

Product Details

MILLS C4 – Bloom Phase Enhancer

Unlock your plant’s potential during flowering with MILLS C4, a premium flowering additive from MILLS NUTRIENTS. Formulated with fulvic acids, bio-stimulants, micro-elements, trace minerals and carbohydrates, it is designed to enhance flower formation and support essential oil production during the critical blooming phase. 🌼🌿

Developed for use during the primordial and pistillate stages, MILLS C4 prepares your crop for explosive flower development and improved overall quality.


Key Benefits of MILLS C4

  • 🚀 Massive bud site expansion – Supports fuller, more productive plants

  • 🌱 Improved fruit set – Encourages earlier flower formation

  • 🧪 Enhanced micro-element absorption – Supports improved plant health

  • 💧 Boosted oil and carbohydrate levels – Helps maximise flavour and aroma

  • 🌸 Denser, harder flowers – Promotes visually striking blooms

  • 🧬 Supports genetic expression – Helps unlock your plant’s full potential


How to Use MILLS C4

  • Apply during the primordial and pistillate stages of flowering 🌼

  • Around week 5 of flowering, pair with MILLS ULTIMATE PK for enhanced flower structure and finish

  • Designed to complement the MILLS NUTRIENTS feeding program 🔁

For growers chasing premium-quality results, combining MILLS C4 with MILLS ULTIMATE PK during mid-to-late bloom supports superior structure and finish. 💯


Overall rating: 5.0 / 5 from 36 reviews.

AI Generated Review Summary

Summary topics

Review topics: [].

Review highlights

Reviews

Great product

"Does exactly what it is intended for Will continue to use this product"

JIENNY (5/5)

love Mills

"love Mills"

Joshua (5/5)

Blooming great

"Mills C4 brings your favourite flowers to a magical bloom - used and recommended"

Rich (5/5)

Good things come in small

"Good things come in small packages"

Dan. F. (5/5)

Mills pays the Bills

"An Integral part of the formula! A must have"

Shane T. (5/5)

Mills C4

"Little extra denser fruit … worth a try , still trying to master"

Lee (5/5)

C4

"Fantastic results using Mills."

Joshua (5/5)

For quality flowers

"Another in the Mills range that delivers as promised. Definitely recommended."

Trent (5/5)

C4

"Mills produces top shelf quality flower."

Joshua (5/5)

C4 is great stuff and

"C4 is great stuff and A-grade hydroponics are very knowledgeable on the products they sell. Wouldn't shop anywhere else."

Joshua S. (5/5)

Q&A

Warranty & Returns

Please choose your products carefully, as A-Grade Hydroponics reserves the right not to accept returns based on either an incorrect choice or a change of mind.

However, we love happy customers so contact us with your query and we will do our best to accommodate you. If you have queries about a product you would like to purchase, please contact us to discuss your concerns before you buy.

A-Grade Hydroponics will honour all manufacturers warranties subject to the terms and conditions of those manufacturers. However warranty does not cover abuse, neglect, improper care, loss or damage from incorrect usage.

Warranty claims will be processed at A-Grade Hydroponics' discretion as a refund, repair or replacement. If products need to be returned to us for warranty purposes e-mail us at grow@agradehydroponics.com with the receipt/invoice number, date of purchase and a brief description of the fault (including photographs where possible). We will then issue you with a product return number.

All returns should be in original packaging and have the receipt/invoice number, date of purchase, and product return number enclosed. The product return number should also be written on the outside of the package for easy identification purposes.

A-Grade Hydroponics has a strict 'no returns' or refunds policy for liquid products, like nutrients, additives, gels, calibration fluids etc, so please choose these items carefully.

Shipping

*All orders are dispatched in unmarked boxes to maintain your privacy.*

DISPATCH AND DELIVERY

Orders are shipped via Australia Post or shipping platform Big Post. Orders are generally dispatched on Tuesday, Wednesday and Friday. Please allow for additional delivery time for remote areas. If you require express delivery, please contact our sales representatives at 03 9555 6667 or email grow@agradehydroponics.com to obtain a quote. 

Couriers will attempt delivery to the specified address. If no one is home to receive the delivery, the couriers will leave your parcel somewhere safe. If there is no safe place, re-delivery or collection will be offered by the carrier.

Due to the increasing frequency of online fraud and theft, we are unable to ship to P.O. Boxes and Parcel Lockers.

SHIPPING COSTS

All freight charges are calculated on weight, dimensions and location. We are committed to keeping shipping charges at a minimum and do not charge handling fees.

Please note: Freight costs are subject to change. Regional areas, large and bulky orders, and tail-lift delivery occasionally incur an additional levy. Should shipping costs need to be amended it will be to reflect the actual charges, and not incur additional ‘shipping and handling’ fees. We will notify you if this rare situation occurs.

A-Grade Hydroponics reserves the right to cancel the order if shipping costs become prohibitive and customers will be issued a full refund.

PAYMENT

All payments must be cleared before dispatch. Payments can be made online via PayPal, AfterPay, PayID or Electronic Funds Transfer. Payments can also be accepted via credit card by phoning 03 9555 6667.

Please allow at least 24 hours for payments to clear.

FULFILMENT OF ORDERS

You will be notified immediately if an item is permanently unavailable, with options for a replacement item at equal or higher value, refund or store credit.

All refunds will clear within 3-5 business days. Store Credits will be issued as an electronic Gift Card to be used online or in-store.

DANGEROUS AND PROHIBITED GOODS

These goods are available for in-store collection only.