Home
Products
Calcium Magnesium Supplement
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz) HydraCalMag (1L / 32oz) HydraCalMag (1L / 32oz) HydraCalMag (1L / 32oz) HydraCalMag (1L / 32oz) HydraCalMag (1L / 32oz) HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)
HydraCalMag (1L / 32oz)

HydraCalMag (1L / 32oz)

HydraCalMag (1L / 32oz)

Boost plant growth and health with HydraCalMag, a powerhouse calcium-magnesium and iron liquid fertilizer for a robust, deficiency-free garden.

Key Features

  • Full Protection against deficiencies and diseases.
  • Advanced micronutrients enhance plant health, growth and yield.
  • Root growth support strengthens and fortifies plants.
  • Repair Foliage and stop yellowing leaves.
$26.39
$26.39 $32.99
Sale Sold out
Shipping calculated at checkout.
  • Free Fast shipping in Canada & USA
  • 90-day money back guarantee
View full details
  • Description
  • Grow
  • Instructions
  • Ingredients
  • FAQs
  • Shipping

Unlock your garden's full potential with HydraCalMag from HydraGarden, a superior Calcium Magnesium supplement that delivers essential nutrients your plants need in one easy dose.

This powerful formula combats common gardening problems like yellowing leaves and stunted growth by combining vital macro & micronutrients such as Calcium, Magnesium, Iron, Molybdenum, and Zinc.

Best For:

  • Gardening Methods: Adapts to any setting, including hydroponics, indoor, outdoor, soil, and soilless.
  • Plant Types: Perfect for all plants, including flowers, vegetables, seedlings and houseplants.
  • Application: Use it your way— soil drench or a direct foliar spray.
  • Optimized For: Preventing and treating plant deficiencies and diseases, including blossom end rot in tomatoes and peppers and yellowing leaves in houseplants.

Packaged in practical 1-liter bottles and crafted in small batches, HydraCalMag reflects over 40 years of expert development. Incorporate it into your gardening routine to simplify plant care, enhance growth, and prevent and treat deficiencies.

Looking for a veggie booster? Explore HydraVeggies for enhanced growth in fruits and vegetables!

    All indoor and outdoor plants, such as:

    • Shake Well: Ensure the contents are thoroughly mixed before use.
    • For Deficiency Prevention: Add 5ml (1 capful) of HydraCalMag per 4 liters of water or 20ml (4 capfuls) per gallon of water.
    • To Treat Existing Deficiencies: Add 2.5ml of HydraCalMag per liter of water or 10ml per gallon of water.
    • Feeding Frequency: Apply HydraCalMag in between your regular nutrient feedings.

    Application Tips

    • pH Adjustment in Hydroponics: Adjust the pH of the water to between 6 and 7 for optimal nutrient absorption.
    • Soil Considerations: Ensure that the soil has sufficient drainage to prevent waterlogging and associated root issues.
    • Foliar Spray Application: If applying as a foliar spray, either turn off grow lights or apply at dawn or dusk to avoid leaf burn. Spray directly onto the leaves.

    ** Each bottle features a child-resistant cap for safety and peace of mind.

    Handcrafted in small batches. HydraCalMag has been in development for 40 + years, this fertilizer is made using quality premium ingredients from Canada and the USA. We manufacture in small batches to ensure quality and accuracy. 

    This nutrient rich formula is made with High Quality Naturally Occurring and Chelated Macro & Micro Nutrients your plants can actually absorb and use to flourish and grow to their maximum potential. NO cheap China ingredients.

    Guaranteed Analysis

    NPK 2.6-0-0

    • Total Nitrogen: 2.6%
    • Calcium: 3.2%
    • Magnesium: 1.2%
    • Iron: 1.3%
    • Molybdenum: 0.0015%
    • Zinc: 0.00075%
    Can HydraCalMag be used on all types of plants?

    Yes, HydraCalMag is versatile and beneficial for all plants, including flowers, vegetables, seedlings, and even disease-susceptible varieties like tomatoes and peppers, preventing common issues like blossom end rot.

    How often should I use HydraCalMag?

    For prevention of nutrient deficiencies, use 5ml per 4 litres of water during regular watering. To correct existing deficiencies, use 2.5ml per litre of water. Adjust the frequency based on plant response and growth stage.

    Is HydraCalMag suitable for both indoor and outdoor plants?

    Absolutely! HydraCalMag is formulated to support vibrant plant growth in both indoor and outdoor settings, whether you're gardening in soil or using hydroponic systems.

    Can I use HydraCalMag as a foliar spray?

    Yes, HydraCalMag doubles as an effective foliar spray, allowing for direct leaf application to quickly address nutrient deficiencies.

    What are the signs of nutrient deficiencies that HydraCalMag can prevent?

    Signs include yellowing leaves, slow growth, poor productivity, and diseases like blossom end rot. HydraCalMag is designed to effectively prevent and treat these deficiencies.

    Is HydraCalMag easy to use?

    Yes, our formulas are user-friendly and suitable for both beginners and enthusiasts. Simply shake well, dilute as directed, and apply to your plants. It's formulated for easy absorption, whether applied to the soil or as a foliar spray.

    Do your products contain dyes?

    No, our products are free from dyes. We carefully craft each formula in small batches using only clean, premium components––all made in Canada.

    What should I do if I see no improvement in plant growth?

    Ensure you are using the correct dosage and frequency. Consider environmental factors such as lighting, temperature, and humidity, and adjust your plant care routine accordingly. If problems persist, reach out for expert advice.

    Can I mix Cal-Mag with my regular HydraGrow nutrients, or should they be used separately?

    No, you should feed Hydragrow on its own and HydraCalmag in between regular plant feedings.

    Do our fertilizers contain EDTA?

    All of our fertilizer formulas contain EDTA or chelated ingredients. EDTA (ethylenediaminetetraacetic acid) is beneficial for plant fertilizers because it acts as a chelating agent.

    This means it can bind to essential micronutrients like calcium, magnesium and iron, making them more soluble and readily available to plants. By enhancing the uptake and transport of these nutrients within the plant, EDTA improves nutrient efficiency, supports healthy growth, and helps prevent deficiencies that could impede plant development.

    Where can I find a complete list of nutrients?

    We only publicly list our minimal guaranteed analysis along with our safety data sheet and metal testing. Our formulas are proprietary.

    • Shipping

      Shipping and handling are free for all paid orders within Canada and the United States.
    • Money Back Guarantee

      We believe in our product and want to create garden solutions that work for everyone, so your purchase comes with a 90-day money-back guarantee, which means that if you don't like your item(s) for any reason, we will fully refund your purchase.

      You can find more details about our Refund policy here.

    Customer Reviews

    Stress-Free Gardening

    Greenhouse grade macro & micro nutrients to reduce deficiencies with calcium, magnesium, iron + more.

    Works in Soil & Soilless Potting Mixes, Hydroponics & Foliar Spray

    NPK 2.6-0-0

    • Aeroponics
    • Deep water culture
    • Hydroponic systems
    • Indoor & outdoor
    • Soilless
    • Gardens
    • Container plants
    • Soil

    All Purpose Advanced CalMag Plant Fertilizer

    Next-level support during vegetative, flower & fruiting growth.

    • Stop leaf yellowing
    • Restore growth
    • Indoor & outdoor
    • Prevent & stop blossom and rot
    • Repair Roots

    CalMag + Micro Nutrients

    Handcrafted in small batches.

    • High quality
    • Non-harmful
    • Locally sourced ingredients

    Meet the Founders

    Anthony Miko

    The powerhouse and visionary behind HydraGarden! With a dynamic 13 years in B2B retail sales and an entrepreneurial mindset, he's not just transforming home gardening; he's also a family guy who loves spending quality time hunting, fishing, and camping with his two awesome daughters and beautiful wife.

    Andrew Ribeiro

    The backbone of HydraGarden! With 15 years of construction and management know-how and a genuine love for gardening, he's the heart, expert and educator of our team. As a devoted dad, he brings the same hands-on care and creativity to HydraGarden that he does to his parenting role.

    Jonathan Moldaver

    The strategic wizard at HydraGarden! With 13 years of business management smarts and a true love for gardening, he's the brains behind our operations. When he's not rocking the business world, he's all about teamwork and growth, whether in the office or enjoying family time.