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FloraFlex CAL+MAG IRON Deficiency Corrector, a 1-gallon white jug of liquid plant nutrient fertilizer.
White 1-gallon FloraFlex Cal-Mag-Iron green plant nutrient jug. Label shows calcium, magnesium, iron fertilizer details.
White 5-gallon FloraFlex CAL+MAG+IRON plant nutrient jug, a deficiency corrector with 2-0-0 formulation.
White FloraFlex Cal-Mag-Iron nutrient gallon jug with green and white label detailing analysis, usage, and warnings.
FloraFlex CAL+MAG IRON Deficiency Corrector, a 1-gallon white jug of liquid plant nutrient fertilizer.
White 1-gallon FloraFlex Cal-Mag-Iron green plant nutrient jug. Label shows calcium, magnesium, iron fertilizer details.
White 5-gallon FloraFlex CAL+MAG+IRON plant nutrient jug, a deficiency corrector with 2-0-0 formulation.
White FloraFlex Cal-Mag-Iron nutrient gallon jug with green and white label detailing analysis, usage, and warnings.

FloraFlex Cal + Mag + Iron Nutrients

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Pay as little as
$4499/mo
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MODEL: FF3319
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FloraFlex Cal + Mag + Iron Nutrients

Experiencing calcium, magnesium, or iron deficiencies in your high-performance growing setup?

The FloraFlex Cal + Mag + Iron supplement delivers targeted nutrition to correct common deficiencies and support vigorous plant development during rapid growth phases.

This specialized supplement integrates seamlessly with FloraFlex 2-part base nutrient formulas and any existing feeding program.

Formulated specifically for calcium, magnesium, and iron supplementation, this product addresses the unique nutritional challenges faced when using reverse osmosis water or growing in soilless media. The balanced formulation ensures plants receive essential secondary nutrients that may be lacking in sterile growing environments.

Essential for growers using RO water, coco coir, rockwool, and hydroponic systems where these critical nutrients are often deficient or unavailable. Plants experiencing rapid growth or developmental phases require enhanced levels of these elements for optimal cellular function and chlorophyll production.

The liquid formulation allows for both reservoir feeding and foliar application, providing flexibility in delivery methods to address deficiencies quickly and maintain consistent plant nutrition.

Product Highlights

  • Targeted calcium, magnesium, and iron supplementation
  • Corrects deficiencies common with RO water and soilless media
  • Compatible with FloraFlex 2-part base nutrients
  • Dual application methods: reservoir and foliar feeding
  • Essential for coco coir, rockwool, and hydroponic growing

FloraFlex Cal + Mag + Iron Features

🎯
Targeted Deficiency Correction

Specifically addresses calcium, magnesium, and iron deficiencies in growing systems.

💧
RO Water Compatible

Essential supplement for reverse osmosis water growing systems.

🌿
Dual Application Methods

Use as reservoir feeding or foliar spray for flexible nutrient delivery.

🔗
FloraFlex System Compatible

Designed to complement FloraFlex 2-part base nutrient formulas.

FloraFlex Cal + Mag + Iron Application Guide

🪣 Reservoir Feeding
Add 2-4 mL per gallon of water
Use during all stages of growth or as needed to prevent and correct calcium, magnesium, and iron deficiencies. Ideal for continuous feeding systems and hydroponic reservoirs.
🌱 Foliar Feeding
Add 15 mL per gallon of water
Apply as a foliar spray for rapid nutrient uptake and quick deficiency correction. Best applied during lights-off periods to prevent leaf burn.
Important Application Notes
  • Shake well before use to ensure proper mixing
  • Adjust pH to proper levels after mixing all fertilizers and additives
  • Recommended for hydroponic use, but compatible with soil applications
  • Monitor plants for improvement within 3-7 days of application

FloraFlex Cal + Mag + Iron FAQs

When should I use FloraFlex Cal + Mag + Iron? +

Use FloraFlex Cal + Mag + Iron when growing with RO water, coco coir, rockwool, or hydroponic systems. Also apply during rapid growth phases or when plants show signs of calcium, magnesium, or iron deficiencies.

Why do I need this supplement with reverse osmosis water? +

RO water removes essential minerals including calcium and magnesium that plants require. FloraFlex Cal + Mag + Iron restores these critical nutrients that are stripped out during the reverse osmosis process.

Can I use FloraFlex Cal + Mag + Iron with other nutrient brands? +

Yes, while FloraFlex Cal + Mag + Iron is designed to complement FloraFlex 2-part base nutrients, it's compatible with most nutrient programs when calcium, magnesium, or iron supplementation is needed.

What's the difference between reservoir and foliar feeding methods? +

Reservoir feeding (2-4 mL/gal) provides consistent, long-term nutrition through root uptake. Foliar feeding (15 mL/gal) delivers nutrients directly through leaves for rapid deficiency correction within 3-7 days.

How do I know if my plants need Cal + Mag + Iron? +

Look for interveinal chlorosis (yellowing between leaf veins), brown spots, or stunted growth. These symptoms are common with calcium, magnesium, and iron deficiencies, especially in coco coir and hydroponic systems.

Is FloraFlex Cal + Mag + Iron safe for soil growing? +

Yes, FloraFlex Cal + Mag + Iron is compatible with soil applications, though it's primarily recommended for hydroponic use. Soil growers using RO water or experiencing deficiencies can benefit from supplementation.

When should I adjust pH after using this supplement? +

Always adjust pH to proper levels after mixing FloraFlex Cal + Mag + Iron with all other fertilizers and additives. The supplement may affect solution pH, so final adjustment ensures optimal nutrient uptake.

How quickly will I see results from this supplement? +

With foliar application, expect improvement within 3-7 days. Reservoir feeding provides gradual improvement over 1-2 weeks. New growth should show healthier coloration and reduced deficiency symptoms.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

  • Most orders are processed within 24-48 hours after being placed.
  • Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

  • USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
  • FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
  • UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

  • These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
  • For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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