Description
Quick Answer
Mills C4 is a concentrated bloom additive for fruiting and flowering plants. It is used as the flowering-stage stimulant within a Mills feed program and is suitable for coco, hydroponic and soil growing media. Select 500mL, 1L or 5L and follow the current Mills growth chart for the applicable week and water type.
Product Description
Mills C4 is formulated for the bloom phase, when fruiting and flowering plants have changing nutritional demands. Mills describes C4 as its bloom additive, while the official growth charts place it alongside Basis A, Basis B and Vitalize during selected flowering weeks.
Application rates vary between the Mills tap-water, reverse-osmosis and high-concentrate programs. For that reason, use the current chart that matches your nutrient line, water source and flowering week instead of relying on one universal dose.
Key Features
- Bloom additive for fruiting and flowering plants
- Designed for use within a Mills nutrient program
- Suitable for coco, hydroponic and soil growing media
- Added during selected bloom weeks according to the Mills growth chart
- Liquid concentrate supplied in three Shopify sizes
Available Sizes and Variants
| Shopify variant | Typical buying need |
|---|---|
| 500mL | Trials, small gardens and lower-volume reservoirs |
| 1L | Regular home or controlled-environment feeding programs |
| 5L | Higher-volume and repeated use |
Select the required size before adding Mills C4 to your cart.
Specifications
| Brand | Mills |
|---|---|
| Product type | Liquid bloom additive |
| Intended stage | Selected weeks of flowering and fruiting |
| Growing media | Coco, hydroponics and soil |
| Use with | A compatible Mills feed program |
| Shopify sizes | 500mL, 1L and 5L |
Package Contents
- One sealed container of Mills C4 in the selected 500mL, 1L or 5L size
Directions for Use
- Choose the current Mills growth chart for your nutrient line and water type.
- Fill the reservoir with water.
- Add Vitalize first when it is part of the chosen program, then mix thoroughly.
- Add Basis A and mix thoroughly. Add the equal amount of Basis B and mix again.
- Add Mills C4 at the chart rate for the applicable flowering week, then mix thoroughly.
- Check and adjust the nutrient-solution pH after all nutrients are mixed.
Do not premix nutrient concentrates. Add each product separately to water and mix before adding the next product. Follow the current product label and Mills chart if they differ from older instructions.
Care, Storage and Safety
- Keep the container closed when not in use and store it away from direct heat.
- Keep out of reach of children.
- Avoid ingestion and contact with eyes or skin.
- Use suitable protective equipment and follow the current product label and Safety Data Sheet.
- Clean measuring equipment after use and prevent concentrate from entering waterways.
Buyer FAQs
What is Mills C4?
It is the Mills liquid bloom additive for fruiting and flowering plants.
Is Mills C4 a complete base nutrient?
No. Mills positions C4 as a flowering-stage additive used with an appropriate base nutrient program.
When should I use Mills C4?
Use it during the flowering weeks shown on the current Mills growth chart for your water source and nutrient program.
How much Mills C4 should I add?
The rate changes by week and chart. Check whether you are following the tap-water, reverse-osmosis or high-concentrate schedule and measure the listed rate.
Can I use Mills C4 in coco?
Yes. The official Mills growth charts state that the regular program can be used in coco, hydro and soil.
Can I use it in hydroponics?
Yes. Add each concentrate separately to reservoir water, mixing thoroughly between products.
Can I use it in soil?
Yes. Soil is included among the media supported by the official Mills charts.
Should nutrient concentrates be mixed together before adding water?
No. Mills cautions against premixing nutrients. Add concentrates to water one at a time and mix thoroughly.
Which sizes are available?
This Shopify listing offers 500mL, 1L and 5L variants.
Does Mills C4 replace Ultimate PK?
No. The Mills growth chart assigns C4 and Ultimate PK to different parts of the bloom program. Follow the chart rather than substituting one for the other.
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Customer Reviews
This is a fantastic product. It's made my grow so much more efficient. I'll definitely be shopping here again.
I'm blown away by the quality of this. It's a proper piece of equipment. Five stars from me.
This is a must-have for any serious grower. It's made a huge difference to my setup.
Top-notch stuff. You can feel the quality. It's a proper piece of equipment that's built to last.
Absolutely brilliant product! Exceeded my expectations in every way. The quality is top-notch and it works perfectly. Cheers to the team for the great service.
Been using this for a few weeks now and I'm seriously impressed. Solid build and does exactly what it says on the tin. My plants have never looked healthier.
Absolute game-changer. Fair dinkum, this is the best bit of kit I've bought in ages. Does exactly what you need it to do, no mucking about. Too easy!
Really happy with this. The quality is ace and the price was spot on. The team in Sunshine North were super helpful when I called up with a question.
Deadset legend, this product. Took my grow to the next level. So glad I found this site, the range is massive. Will be back for more.
Quality is unreal. You can tell it's not cheap rubbish. It's a proper bit of gear that does the job well. Postage was lightning fast too.
