Mills C4 Flowering Booster
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Mills C4 Flowering Booster
Mills C4 – Flowering Stimulator
Mills C4 is an advanced flowering stimulator designed to support flower and fruit development during the early and middle stages of flowering. It helps plants utilise carbohydrates, nutrients and trace minerals while encouraging the production of natural sugars and essential oils.
When used alongside Mills Basis A & B, C4 increases the proportion of phosphorus and potassium in the feeding programme, supporting flower formation, plant vitality and overall yields.
Its predominantly organic formulation is designed to work alongside beneficial bacteria and fungi, making it suitable for soil, coco and hydroponic growing systems.
Key Features
- Designed for early and mid-flowering stages
- Supports flower and fruit formation
- Encourages natural sugar and essential oil production
- Helps improve flower and fruit development
- Supports healthy plant growth and vitality
- Compatible with beneficial bacteria and fungi
- Suitable for soil, coco and hydroponics
How Does Mills C4 Work?
C4 complements a base nutrient programme by providing additional support during the important early stages of flowering, when plants begin directing more energy towards flower and fruit production.
| Function | Benefit |
|---|---|
| Flower Development | Supports flower initiation and the formation of productive flowering sites. |
| Nutrient Balance | Increases the relative phosphorus and potassium contribution when used with Basis A & B. |
| Sugar & Oil Production | Encourages the development of natural sugars and essential oils. |
| Plant Vitality | Supports healthy development throughout early and mid-flowering. |
How to Use Mills C4
Use Mills C4 during the early and middle stages of flowering alongside your regular base nutrients.
- Prepare your nutrient solution using Mills Basis A & B.
- Add the recommended amount of Mills C4 and mix thoroughly.
- Check and adjust the final EC and pH as required.
Product Information
| Product Type | Flowering stimulator |
|---|---|
| Growth Stage | Early to mid-flowering |
| Growing Media | Soil, coco and hydroponics |
| Formulation | Predominantly organic |
| Compatible With | Mills Basis A & B and beneficial microorganisms |
Mills Feeding Schedule
For recommended application rates and guidance on using C4 alongside other Mills nutrients, see our Mills Feeding Schedules.
Mills Feedchart UK
- Quicker and more abundant fruit set
- Promotion of plant growth and vitality
- Increased oil and sugar production
- Heavier fruit and flowers
| Weight | 6.0000 kg |
|---|---|
| Size | 5 Litre, 250ml, 1 Litre |
FREE NEXT DAY DELIVERY – Delivery Information
We offer FREE NEXT-DAY DELIVERY on orders over £75*
*An additional heavy goods surcharge may be applied to heavy or bulky goods (more info).
**Regional delivery surcharges apply for Scotland, Northern Ireland and the rest of the UK.
Orders Under £75
– Orders under £75 and under 5KG will be charged £7.99 (inc vat).
– Orders under £75 and 5KG+ will be charged at £8.99 (inc vat).
Our Next Working Day Delivery Policy
We will always do our utmost to deliver goods to you the next working day for all orders placed before 3pm (Mon-Thurs).



