Mills C4

Mills Nutrients C4 | Bloom Booster & Early Flowering Stimulator

Mills Nutrients C4 is a powerful bloom booster designed to give your plants the strongest possible start to the flowering phase. By delivering a precisely balanced combination of essential nutrients and natural biostimulants, C4 lays the foundations for larger yields, improved fruit development, and a noticeably sweeter-tasting end product.

How Mills C4 Works

C4’s advanced formula combines four key components — phosphorus, potassium, biostimulants, and carbohydrates — each playing a distinct and vital role in early bloom performance.

As plants transition into the flowering stage, their demand for phosphorus and potassium increases significantly. C4 meets this demand directly, ensuring plants have exactly what they need to reach their full genetic potential. The biostimulants act as natural growth accelerators, signalling plants to ramp up growth rates while simultaneously building resilience against common stressors including pests, diseases, and environmental fluctuations. Meanwhile, the added carbohydrates supercharge photosynthesis and raise BRIX levels — the key marker of sugar content in plant tissue — resulting in healthier growth and superior flavour profiles in the final harvest.

Key Benefits Of Mills Nutrients C4

• Potent bloom booster that kickstarts and accelerates the flowering phase
• Speeds up early fruit development for improved structure and size
• Raises BRIX levels for sweeter, higher-quality end products
• Strengthens plant immunity and resistance to pests, disease, and stress
• Loaded with phosphorus, potassium, biostimulants, and carbohydrates
• Lays the essential foundations for bigger, heavier yields
• Used from week 3 through to week 6 of the flowering stage
• Pairs seamlessly with Ultimate PK from week 6 onwards
• Available in two sizes: 1L, and 5L

How To Use Mills Nutrients C4

C4 is used during weeks 3–6 of the flowering phase. Doses below are per 10 litres of nutrient solution:

• Week 3: 10ml
• Week 4: 10ml
• Week 5: 20ml
• Week 6: 10ml

From week 6, use C4 alongside Ultimate PK for maximum flowering performance. For a full feeding schedule, refer to the Mills Nutrients feed chart available in the downloads section.

Keep out of reach of children. Avoid contact with eyes, skin, and clothing. Do not ingest or inhale. This product may be corrosive if swallowed and can cause skin irritation with prolonged exposure. Store away from direct heat and open flames.