Emerald Harvest - Cali Pro Bloom A&B

Two-Part Bloom Nutrients for Flowering and Fruiting

Emerald Harvest Cali Pro Bloom A&B is a premium two-part base nutrient formulated to support healthy flower development, fruiting and consistent nutrition throughout the flowering stage. With a phosphorus and potassium-rich nutrient profile, it supplies the essential macro and micronutrients plants need as they move from vegetative growth into flowering.

Made using high-quality mineral nutrients and chelated trace elements, Cali Pro Bloom A&B provides a straightforward feeding programme without the complexity of mixing three separate base nutrients. It's suitable for hydroponics, coco and soil, making it a practical choice for growers looking for reliable flowering nutrition across different growing systems.

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

Key Benefits

• Formulated for flowering and fruiting – provides the phosphorus and potassium plants need to support healthy flower and fruit development.
• Complete two-part base nutrient – supplies essential macro and micronutrients throughout the flowering stage.
• 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 manufacturer's feeding schedule.
• Suitable for multiple growing methods – designed for use with hydroponics, coco and soil, including recirculating and drain-to-waste systems.
• Part of the Cali Pro range – works alongside Cali Pro Grow A&B to provide balanced nutrition from vegetative growth through to flowering.

Why You Need Emerald Harvest Cali Pro Bloom A&B

As plants enter flowering, their nutritional requirements change. While nitrogen remains important, phosphorus and potassium become increasingly important for supporting flower formation, fruit development and overall plant health.

Cali Pro Bloom A&B is formulated specifically for this stage, supplying a balanced combination of essential nutrients alongside chelated trace elements. Chelation helps maintain the availability of important micronutrients, supporting consistent nutrition when your feeding solution is maintained within the recommended pH range.

The two-part formulation also keeps feeding straightforward. Instead of measuring and adjusting three separate base nutrients, you simply add equal amounts of Bloom A and Bloom B according to the manufacturer's feeding schedule.

For a complete feeding programme, use Emerald Harvest Cali Pro Grow A&B during vegetative growth before switching to Bloom A&B from the second week of flowering.

How to Use Emerald Harvest Cali Pro Bloom A&B

Cali Pro Bloom A&B is designed for the flowering stage. Emerald Harvest recommends using Cali Pro Grow A&B during vegetative growth and the first week of flowering transition, then introducing Bloom A&B from the second week.

Both parts must be used together in equal amounts to maintain the correct nutrient balance.

1. Start with fresh water: Fill your reservoir or watering can with the required amount of water.
2. Add Bloom A first: Measure the recommended amount of Cali Pro Bloom A, add it directly to the water and mix thoroughly.
3. Add Bloom B: Add an equal amount of Cali Pro Bloom B and mix thoroughly again.
4. Add 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 the 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 Bloom A&B Feeding Schedule

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

The following schedule covers the nine-week flowering phase of Emerald Harvest's official 2-Part Nutrient Series feeding chart.

Flowering Week	Growth Stage	Bloom A	Bloom B
Week 1	Transition	–	–
Week 2	Early Flowering	1.25ml/L	1.25ml/L
Week 3	Early Flowering	1.25ml/L	1.25ml/L
Week 4	Mid Flowering	1.5ml/L	1.5ml/L
Week 5	Mid Flowering	1.5ml/L	1.5ml/L
Week 6	Late Flowering	1.5ml/L	1.5ml/L
Week 7	Late Flowering	1.5ml/L	1.5ml/L
Week 8	Ripening	1.5ml/L	1.5ml/L
Week 9	Ripening	0.25ml/L	0.25ml/L

When to switch: Continue using Cali Pro Grow A&B during the first week of flowering transition. Replace it with Cali Pro Bloom A&B from week two, following the recommended rates above.

If your plants need a longer flowering period, Emerald Harvest recommends repeating one or more mid-flowering weeks as required. Always monitor plant response and adjust your feeding programme if necessary.

For the complete feeding programme, including Emerald Goddess, King Kola, Honey Chome and Root Wizard, view the official Emerald Harvest 2-Part Feeding Chart.

Tech Specs

• Brand: Emerald Harvest
• Product: Cali Pro Bloom A&B
• Nutrient type: Two-part mineral base nutrient
• Growth stage: Flowering and fruiting
• Part A NPK: 3-0-3
• Part B NPK: 1-4-6
• 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, 1.89L, 3.79L, 9.46L and 22.71L sets
• Mixing ratio: Equal amounts of Part A and Part B

Top Tip: Get the transition from Grow to Bloom right. Emerald Harvest recommends continuing Cali Pro Grow A&B throughout the first week of flowering before switching to Bloom A&B in week two. If you're running the complete Emerald Harvest range, follow the official feeding chart to introduce flowering additives at the correct stages rather than adding everything at once.