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Regular price
$20.90 CAD
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 per 

This is a fortified version of our iconic Marine Phytoplankton Soil Enhancer, now enriched with essential Calcium (Ca) and Magnesium (Mg) to target two of the most common nutrient deficiencies in plants.

While the original MARPHYL Soil Enhancer already provides a full spectrum of micronutrients from up to 80 species of wild marine phytoplankton, Phytoplankton +Cal-Mag adds significant levels of Calcium (0.236%) and Magnesium (0.149%) for targeted benefits and improved performance.

Key benefits of Phytoplankton + Cal-Mag

  • Strengthens roots, stems, and cell walls
  • Boosts resilience during heat, drought, or transplanting
  • Supports fruit set and prevents common calcium-related disorders
  • Enhances chlorophyll production and energy transfer
  • Improves soil aeration, pH balance, and water infiltration
  • Ideal for crops with high Ca/Mg needs such as tomatoes, peppers, orchids, tropical plants, leafy greens, and fruit trees

All of these advantages come with the same ease of use, same 1:20 dilution ratio, and the same clean, ocean-derived formulation you already trust.

How to use: https://marphyl.com/directions/

What is the expiration date?  There is none! Or as @rayray_oxygen_entertainment said it is “Eternity and a day”.
You can pre-mix it and store as long as you want. Just shake well before using again.

Size
Phytoplankton + Cal-Mag Organic Soil Enhancer / Fertilizer / Plant food
Size
  • Size: 500ml / 16.9 oz

WHAT PEOPLE SAY:

Description

Perfect for Gardens, Houseplants, Hydroponics, Orchids, and More

Phytoplankton + Cal-Mag works across a wide range of growing environments:

  • Indoor and outdoor plants
  • Vegetable gardens
  • Orchids and tropicals
  • Hydroponic systems
  • Greenhouses and raised beds
  • Fruit trees, tomatoes, peppers, and root crops

Still 100% Natural, Sustainable, and Ocean-Friendly

Just like the rest of our products, Phytoplankton + Cal-Mag is:

  • Plant-based
  • Non-GMO
  • Pet-safe and non-toxic
  • OMRI Listed for organic use
  • Made from sustainably reproduced wild marine phytoplankton on Vancouver Island

Our patented harvesting process reproduces phytoplankton using natural sunlight and environment, creating a nutrient-dense product while returning ocean water back with the same phytoplankton density it originally had. This ensures no negative impact on marine ecosystems.

Guaranteed Analysis

Calcium | 2360ppm | 0.236%
Magnesium/Magnésium | 1490ppm | 0.149%
Nitrogen/Azote | 1900ppm | 0.19%
Phosphorus/Phosphore | 9.6ppm | 0.00096%
Potassium | 314ppm | 0.0314%
Boron/Bore | 5.3ppm | 0.00053%
Iron/Fer | 4.3ppm | 0.00043%

PPM = Part per million

Benefits

Phytoplankton + Cal-Mag: A Powerful New Upgrade for Stronger, Healthier Plants

Calcium and magnesium are often
overlooked in everyday fertilizing routines, yet they play foundational
roles in how plants grow and thrive.

The role of Calcium

  • Building strong cell walls
  • Increasing resistance to pests and diseases
  • Preventing issues like blossom-end rot in tomatoes and peppers
  • Improving soil structure and nutrient availability

A plant with adequate calcium develops stronger stems, healthier fruit, and better resilience under stress.

The role of Magnesium

Magnesium is the central element in chlorophyll, which means it directly fuels photosynthesis. It’s essential for:

  • Energy production
  • Sugar transport
  • Nutrient mobilization
  • Lush green foliage and continuous growth

Together, calcium and magnesium form a powerful duo that supports both
structure and metabolism — the foundations of strong, productive plants.

How to use

Shake well before use. Mix 1 portion of MARPHYL®Soil Enhancer with 20 portions of fresh water and apply to soil/plants/ vegetables. One 500 ml bottle mixed with sufficient water can cover a lawn up to 70 m2(750 ft2). Do not over water.

Scroll down for more information.

Shipping

We’ve recently introduced the following shipping rates:

Canada and USA – 20$ (FREE shipping for orders over 70$)
Rest of the World – 50$ (FREE shipping for orders over 120$)

IMPORTANT: : If the shipping cost is above 50$ we cover the first 50$ of the shipping cost. E.g. if the shipping cost is 70$, we will cover 50$ and contact you to pay the remaining 20$ prior to shipping your order.

Additional information

Weight 9.7 lbs
Dimensions11 × 9 × 5 in
Size 500 ml – 16.9 oz, 1 L – 33.8 oz, 2 L – 67.6 oz, 4 L – 1.05 gal

Which MARPHYL Soil Enhancer / Fertilizer / Plan Food should I buy?

If you are not sure which Soil Enhancer is best for your needs see this guide Which MARPHYL Soil Enhancer / Fertilizer / Plan Food should I buy?

HOW TO USE

MARPHYL® ORGANIC SOIL ENHANCER

  1. Shake well the bottle of MARPHYL® Organic Soil Enhancer.
  2. Open the bottle. The liquid should look cloudy brown. A presence of some unpleasant smell is normal. The product is 100% natural and is made of decomposed phytoplankton. The smell will dissipate after you mix the Soil Enhancer with water, you can also let the bottle opened for 1-2 days outside and the smell will dissipate on it’s own. 
  3. Fill up your watering tank with enough fresh water to water your plants.
  4. Measure how much MARPHYL® Soil Enhancer you need. The rule is simple – you need 20 times less Soil Enhancer than water.
  5. Add the required amount of MARPHYL® Soil Enhancer into the watering tank. Mix well.
    If you are using a hose with an automatic dispenser, you should regulate your dispenser for 1/20 (which usually is the setting #5). But you would need to validate the dispenser ratio. Usually, these systems work on an oz per gallon fraction (so 6 oz per gallon in the case of MARPHYL®)
  6. Apply the mixture to the soil of your plants.
  7. Repeat the process once every two weeks.

If you have any questions, feel free to reach out to us through our contact form or Instagram.

VIDEO FILMED AT JUNGLE PLANT STORE IN VANCOUVER, BC, CANADA

Example of dilution rate

How to use MARPHYL® Organic Soil Enhancer

On what plants can you use MARPHYL® Soil Enhancer