Emerald Harvest - Cali Pro Grow A&B

Two-Part Grow Nutrients for Strong Vegetative Growth

Emerald Harvest Cali Pro Grow A&B is a premium two-part base nutrient designed to support vigorous vegetative growth, strong stems and healthy root development. Its nitrogen-rich formula supplies the essential macro and micronutrients your plants need to develop healthy leaves and branches, building a strong foundation before flowering.

Made with high-quality mineral nutrients and chelated trace elements, Cali Pro Grow A&B delivers a balanced feeding programme without the complexity of a three-part nutrient system. Suitable for hydroponics, coco and soil, it's a straightforward choice for beginners and experienced growers who want reliable nutrition throughout the vegetative stage.

Please note: The 9.46L and 22.71L sizes are purchase to order, so delivery may take slightly longer than usual.

Key Benefits

• Nitrogen-rich vegetative formula – supports healthy leaf development, strong stems and vigorous plant growth.
• Complete two-part base nutrient – provides essential macro and micronutrients in an easy-to-use Grow A&B formulation.
• Chelated micronutrients – contains chelated iron, copper, manganese and zinc to support nutrient availability.
• Simple feeding programme – mix equal amounts of Part A and Part B according to the recommended feeding schedule.
• Suitable for multiple growing methods – works with hydroponics, coco coir and soil, including recirculating and drain-to-waste systems.
• Designed for the full growth cycle – pair with Cali Pro Bloom A&B when it's time to move into flowering.

Why You Need Emerald Harvest Cali Pro Grow A&B

Vegetative growth is when your plants establish the structure they'll rely on throughout the rest of their lifecycle. Providing the right balance of nutrients at this stage supports healthy foliage, strong branches and consistent development.

Cali Pro Grow A&B provides a nitrogen-rich nutrient profile alongside phosphorus, potassium, calcium, magnesium and essential micronutrients. Its chelated trace elements help maintain nutrient availability, supporting efficient uptake when your feeding solution is kept within the recommended pH range.

One of the biggest advantages is simplicity. Instead of measuring three separate base nutrients, Cali Pro uses just two components in equal amounts. You get a balanced feeding programme that's easy to follow, whether you're running a small grow tent or managing a larger hydroponic setup.

When your plants enter their flowering stage, switch to Emerald Harvest Cali Pro Bloom A&B according to the manufacturer's feeding schedule.

How to Use Emerald Harvest Cali Pro Grow A&B

Cali Pro Grow A&B is designed for the vegetative stage and the initial transition into flowering. Both parts must be used together in equal amounts to maintain the intended nutrient balance.

1. Start with fresh water: Fill your reservoir or watering can with the required amount of water.
2. Add Grow A first: Measure the recommended amount of Cali Pro Grow A, add it directly to the water and mix thoroughly.
3. Add Grow B: Add an equal amount of Cali Pro Grow B and mix thoroughly again.
4. Add any additional nutrients: If you're using Emerald Harvest additives, introduce them individually according to the manufacturer's feeding schedule.
5. Check your readings: Measure your EC and adjust your final nutrient solution to the recommended pH range of 5.8–6.3.

Important: Never mix concentrated Part A and Part B together before adding them to water. Always dilute and mix each component separately.

Emerald Harvest Cali Pro Grow A&B Feeding Schedule

Follow the manufacturer's recommended feeding rates below. All measurements are per litre of water, with equal amounts of Grow A and Grow B.

Growth Stage	Grow A	Grow B
Seedlings & Cuttings	0.5ml/L	0.5ml/L
Transplants	0.75ml/L	0.75ml/L
Early Vegetative	1ml/L	1ml/L
Late Vegetative	1.25ml/L	1.25ml/L
Flowering Transition – Week 1	1.25ml/L	1.25ml/L

When to switch: Emerald Harvest recommends continuing Cali Pro Grow A&B during the first week of the flowering transition, then switching to Cali Pro Bloom A&B from the second week of flowering.

If you need to extend vegetative growth, repeat the late vegetative feeding stage as required. Always monitor your plants and adjust nutrient strength according to their response.

For the complete feeding programme, including Emerald Harvest additives, view the official Emerald Harvest 2-Part Feeding Chart.

Tech Specs

• Brand: Emerald Harvest
• Product: Cali Pro Grow A&B
• Nutrient type: Two-part mineral base nutrient
• Growth stage: Vegetative growth and first week of flowering transition
• Part A NPK: 3-0-0
• Part B NPK: 2-2-5
• Key nutrients: Nitrogen, phosphorus, potassium, calcium, magnesium and essential micronutrients
• Chelated micronutrients: Iron, copper, manganese and zinc
• Recommended pH: 5.8–6.3 after mixing
• Recommended water temperature: 16–22°C
• Suitable media: Hydroponics, coco and soil
• Suitable systems: Recirculating and drain-to-waste
• Available sizes: 0.95L, 3.79L, 9.46L and 22.71L sets
• Mixing ratio: Equal amounts of Part A and Part B

Top Tip: Don't rush the switch to flowering nutrients. Emerald Harvest's feeding schedule continues Cali Pro Grow A&B through the first week of the flowering transition before introducing Bloom A&B in week two. Following the correct transition schedule helps you maintain consistent nutrition as your plants move from vegetative growth into flowering.