• FloraFlex Nutrients B1 - 25 LB
1 1

Product benefits

  • Balanced Bloom Nutrition
  • Complete Nutrition
  • Flower Initiation
  • Flower Energy
  • Bloom Support
  • Multi-Media Ready
  • Calcium & Magnesium Support
  • Fully Water Soluble

This product may offer additional benefits beyond those listed.

Frequently purchased together

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FloraFlex Nutrients B1 - 25 LB

Flowering Stage Indoor Outdoor Regular Watering Watering Systems Hydroponics Coco Coir Safe Soil Soilless
$299.99
$299.99
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Manufacturer Recommended Products

FloraFlex Nutrients B2 - 25 LB
FloraFlex Nutrients B2 - 25 LB
$341.25
These manufacturer-recommended products are designed to be used with this product for proper performance and best results. In multi-component systems, all recommended components should be used together as directed to help ensure effective use.

Product benefits

  • Balanced Bloom Nutrition
  • Complete Nutrition
  • Flower Initiation
  • Flower Energy
  • Bloom Support
  • Multi-Media Ready
  • Calcium & Magnesium Support
  • Fully Water Soluble

This product may offer additional benefits beyond those listed.

Description
Description
FloraFlex Nutrients B1 and B2 are a two-part bloom base nutrient set, a water soluble powder fertilizer for flowering-stage nutrition and consistent essential elements. This bloom cycle fertilizer system is built for growers who want clean, repeatable bloom-stage feeding without a shelf full of bottles.

FloraFlex describes this line as an easy to use two part powder formula, engineered as clean nutrient formula and pH stable nutrients. Instead of hiding what’s inside behind vague marketing, it’s positioned around an elemental breakdown approach and the essential elements plants rely on throughout a bloom cycle. The facts layer stays simple: B1 is 14-0-22 and B2 is 0-28-18, keeping nitrogen support in part 1 and the heavier bloom-side phosphorus and potassium support in part 2.

Because FloraFlex centers the nutrient line around essential elements, B1 and B2 are meant to cover the core nutritional bases, not just chase one “boost.” Across the set, the blend is described as including macronutrients plus secondary nutrients and micronutrients that support complete plant function. In plain terms, that includes nitrogen, phosphorus, and potassium alongside calcium, magnesium, sulfur, and micronutrients such as iron, manganese, zinc, boron, copper, and molybdenum.

What this does for the plant is equally straightforward when you keep it at the function level. Nitrogen supports strong, vigorous growth and photosynthesis, helping maintain healthy leaf color. Phosphorus plays a key role in photosynthesis and, during bloom, supports flower-site development and ripening in flowering plants. Potassium supports overall plant health and helps drive quality in flowers and fruits, while calcium supports plant strength as growth accelerates during the bloom cycle.

This two-part nutrient system is positioned as hydroponic nutrients and is also described for soil and soilless cultivation, giving it broad media fit without changing the core formula concept. It’s also referenced for dosing and fertigation systems where a water soluble powder and pH stable nutrients can be valuable for consistency. FloraFlex Nutrients B1 and B2 are a good fit for growers who want a two-part bloom base nutrient set with essential elements, an elemental breakdown focus, and a clean, simple foundation for the flowering stage.
How to use
Vegetative stage - B1:
- Week 1: do not use this product during this week of vegetative growth.
- Week 2: do not use this product during this week of vegetative growth.
- Week 3: do not use this product during this week of vegetative growth.
- Week 4: do not use this product during this week of vegetative growth.

Flowering stage - B1:
- Week 1: mix 0.92 g per litre of water or nutrient solution.
- Week 2: mix 0.92 g per litre of water or nutrient solution.
- Week 3: mix 0.92 g per litre of water or nutrient solution.
- Week 4: mix 0.92 g per litre of water or nutrient solution.
- Week 5: mix 0.92 g per litre of water or nutrient solution.
- Week 6: mix 0.92 g per litre of water or nutrient solution.
- Week 7: mix 0.92 g per litre of water or nutrient solution.
- Week 8: do not use this product during this week of flowering.

Vegetative stage - B1:
- Week 1: do not use this product during this week of vegetative growth.
- Week 2: do not use this product during this week of vegetative growth.
- Week 3: do not use this product during this week of vegetative growth.
- Week 4: do not use this product during this week of vegetative growth.

Flowering stage - B1:
- Week 1: mix 0.79 g per litre of water or nutrient solution.
- Week 2: mix 0.79 g per litre of water or nutrient solution.
- Week 3: mix 0.79 g per litre of water or nutrient solution.
- Week 4: mix 0.79 g per litre of water or nutrient solution.
- Week 5: mix 0.79 g per litre of water or nutrient solution.
- Week 6: mix 0.4 g per litre of water or nutrient solution.
- Week 7: do not use this product during this week of flowering.
- Week 8: do not use this product during this week of flowering.
Product benefits
Flowering Stage; Indoor; Outdoor; Regular Watering; Watering Systems; Hydroponics; Coco Coir Safe; Soil; Soilless; Balanced Bloom Nutrition; Complete Nutrition; Flower Initiation; Flower Energy; Bloom Support; Multi-Media Ready; Calcium & Magnesium Support; Fully Water Soluble.
Guaranteed analysis
Total Nitrogen (N): 14.0%; Nitrate Nitrogen (N): 13.5%; Ammoniacal Nitrogen (N): 0.5%; Soluble Potash (K2O): 22.0%; Calcium (Ca): 7.0%; Molybdenum (Mo): 0.001%.
Derived from
Calcium Nitrate; Potassium Nitrate; Ammonium Molybdate.

How To Use

How to Use FloraFlex Nutrients B1 - 25 LB

Step-by-step mixing and feeding instructions for FloraFlex Nutrients B1 - 25 LB.

Mixing & preparation

Fill your reservoir or watering container with clean, room-temperature water first. Shake the bottle of FloraFlex Nutrients B1 - 25 LB well before every use. Using the feeding schedule below, measure the recommended dose and add it directly to the water while stirring. Allow the solution to mix fully before adding any other fertilizers, additives, or supplements.

Always add nutrients to water — not the other way around. Mix thoroughly between products to ensure an even, stable nutrient solution.

Week-by-week feeding schedule

Vegetative stage — B1

  • Week 1: do not use this product during this week of vegetative growth.
  • Week 2: do not use this product during this week of vegetative growth.
  • Week 3: do not use this product during this week of vegetative growth.
  • Week 4: do not use this product during this week of vegetative growth.

Flowering stage — B1

  • Week 1: mix 0.92 g per litre of water or nutrient solution.
  • Week 2: mix 0.92 g per litre of water or nutrient solution.
  • Week 3: mix 0.92 g per litre of water or nutrient solution.
  • Week 4: mix 0.92 g per litre of water or nutrient solution.
  • Week 5: mix 0.92 g per litre of water or nutrient solution.
  • Week 6: mix 0.92 g per litre of water or nutrient solution.
  • Week 7: mix 0.92 g per litre of water or nutrient solution.
  • Week 8: do not use this product during this week of flowering.

Vegetative stage — B1

  • Week 1: do not use this product during this week of vegetative growth.
  • Week 2: do not use this product during this week of vegetative growth.
  • Week 3: do not use this product during this week of vegetative growth.
  • Week 4: do not use this product during this week of vegetative growth.

Flowering stage — B1

  • Week 1: mix 0.79 g per litre of water or nutrient solution.
  • Week 2: mix 0.79 g per litre of water or nutrient solution.
  • Week 3: mix 0.79 g per litre of water or nutrient solution.
  • Week 4: mix 0.79 g per litre of water or nutrient solution.
  • Week 5: mix 0.79 g per litre of water or nutrient solution.
  • Week 6: mix 0.4 g per litre of water or nutrient solution.
  • Week 7: do not use this product during this week of flowering.
  • Week 8: do not use this product during this week of flowering.
Tips for best results
  • Maintain pH and EC/ppm within the range recommended for your growing medium and crop.
  • Use fresh nutrient solution whenever possible and avoid leaving mixed solution stagnant for long periods.
  • Store nutrients in a cool, dark place away from direct sunlight and extreme temperatures.
  • Keep bottles tightly sealed when not in use to reduce air exposure and preserve product quality.
  • Use clean measuring tools and regularly rinse or clean your reservoir, lines, and irrigation equipment.
Common mistakes to avoid
  • Do not mix different nutrients or additives together in concentrated form before adding them to water.
  • Do not exceed the recommended dosage unless you are following a tested, crop-specific feeding plan.
  • Do not skip pH or EC/ppm checks when growing in hydroponic or soilless systems.
  • Do not allow the nutrient solution to freeze or overheat, as this can damage the formulation.
  • Do not ignore the directions on the product label for your specific crop, growth stage, and system type.

Warnings & Safety
Important – Safety Information

This product may cause mild skin irritation and eye irritation. Avoid unnecessary contact with skin, eyes, and clothing. Use only as directed.

General Safety Precautions

Read and follow all instructions on the product label and any accompanying documentation before use. Keep out of reach of children and pets. Do not ingest. Avoid breathing vapours, mist, or dust that may be generated during handling or use.

Wear appropriate personal protective equipment (PPE), such as protective gloves, long sleeves, long pants and closed-toe footwear. When there is a risk of splashing or airborne particles, use safety glasses or other suitable eye and face protection.

First Aid – Skin Contact

IF ON SKIN OR HAIR: Remove contaminated clothing immediately. Rinse skin with clean water for several minutes, then wash with mild soap and water. If irritation or redness develops and persists, seek medical attention. Wash contaminated clothing before reuse.

First Aid – Eye Contact

IF IN EYES: Rinse cautiously with clean water for several minutes, keeping eyelids open. Remove contact lenses if present and easy to do. Continue rinsing. If irritation persists, obtain medical advice.

First Aid – Ingestion

IF SWALLOWED: Rinse mouth thoroughly with water. Do not induce vomiting unless instructed by a medical professional. Seek medical attention if you feel unwell.

First aid – Inhalation

IF INHALED: Move the person to fresh air and keep them comfortable for breathing. If coughing, breathing difficulty, dizziness or other symptoms occur, seek medical assistance.

Storage And Handling

Store this product in its original closed container, in a cool, dry and well-ventilated area. Protect from extreme temperatures and direct sunlight. Keep container tightly sealed when not in use.

Avoid release to drains, natural waterways or outdoor soil. Dispose of unused product and empty containers in accordance with local regulations and the directions on the label.

Important – Medical

If medical advice is needed, keep the product label or container available. Always follow the specific instructions and safety recommendations provided by the manufacturer. This safety notice is intended as general guidance and does not replace official label directions or documentation.

Guaranteed Minimum Analysis
Total Nitrogen (N) 14.0%
Nitrate Nitrogen (N) 13.5%
Ammoniacal Nitrogen (N) 0.5%
Soluble Potash (K2O) 22.0%
Calcium (Ca) 7.0%
Molybdenum (Mo) 0.001%

Derived From
Calcium Nitrate
Potassium Nitrate
Ammonium Molybdate

Frequently Asked Questions
Why is total nitrogen (N) important for plant growth, and what makes it different from other nutrients?

Total Nitrogen is important because it directly drives leafy growth, chlorophyll production, and overall growth speed, which sets the pace for the entire plant. It’s unique because the “total” number can include different nitrogen forms that behave differently in the root zone, meaning the same total amount can produce very different results depending on the nitrogen type and plant stage.

Read the full guide

What does nitrate nitrogen (N) do for plants?

Nitrate Nitrogen provides a stable, easy-to-absorb form of nitrogen that supports steady growth, strong foliage, and reliable plant development without sudden nutrient swings.

Read the full guide

What Is ammoniacal nitrogen (N) and why do plants need It?

Ammoniacal Nitrogen (N) is a plant-available form of ammonium (NH₄⁺) that provides a steady, gentle source of nitrogen for healthy green growth. Unlike fast-release nitrogen types, ammoniacal nitrogen feeds plants slowly, helps stabilize root-zone pH, and works well in cooler temperatures. It is commonly used during early vegetative growth because it supports strong leaf development without burning young roots. If plants show pale leaves, slow growth, or weak stems, they may need more available ammoniacal nitrogen.

Read the full guide

Why is soluble potash (K2O) important for plants?

Soluble potash (K2O) is important because it helps plants control water use, move sugars to new growth and fruit, and build stronger, higher-quality structure under stress. It’s unique from many other nutrients because it acts more like a regulator and transport helper than a direct “building material,” so the biggest benefits show up as steadier growth, stronger stems, and better finishing instead of just bigger leaves.

Read the full guide

Why is calcium important for plant growth?

Calcium is important because it builds and stabilizes plant cells as they form, acting as the structural support that keeps new growth strong and functional. Unlike other nutrients that drive color or speed of growth, calcium’s role is unique because it controls cell wall strength and membrane stability, making it essential for healthy roots, shoots, and long-term plant resilience rather than quick visual results.

Read the full guide

Why is molybdenum (Mo) important for plant growth?

Molybdenum is important because it helps plants convert nitrogen into usable building blocks for chlorophyll and growth, and it’s unique from many nutrients because it mainly supports enzyme-driven “nutrient use” rather than directly building plant tissue.

Read the full guide

Why do growers use calcium nitrate instead of other calcium sources?

Calcium nitrate is important because it supplies calcium in a fast, highly available form that supports strong new growth and healthy root tips, while also providing nitrate nitrogen for steady, usable growth energy. It’s unique because it delivers calcium together with nitrate nitrogen, making it especially effective during rapid growth phases when plants need both structure-building calcium and immediately available nitrogen at the same time.

Read the full guide

Why does ammonium molybdate matter if plants only need tiny amounts of molybdenum?

Even in tiny amounts, molybdenum is crucial because it helps plants convert absorbed nitrogen, especially nitrate, into forms they can actually use to build new growth. That makes ammonium molybdate unique from many other micronutrient sources: it supports nitrogen-use efficiency, so a shortage can make plants look nitrogen-deficient even when feeding is adequate, leading to slow growth, pale leaves, and weak vigor unless the bottleneck is fixed.

Read the full guide

Is potassium nitrate better for quick deficiency correction than other potassium sources?

Potassium nitrate is often better for quick correction when the plant needs both potassium and fast nitrate nitrogen, because it dissolves cleanly and is taken up quickly, unlike potassium sources that don’t supply nitrogen. It’s unique because it can restore leaf color and growth momentum while also improving water regulation, but it can backfire if nitrogen is already high or if salt levels are already stressing the roots.

Read the full guide

Frequently purchased together

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Nutrient Feed Chart

Vegetative — Week 1

  1. V1
    —
  2. V2
    —
  3. B1
    —
  4. B2
    —

Flowering — Week 1

  1. V1
    —
  2. V2
    —
  3. B1
    —
  4. B2
    —

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