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

Gardeners, growers, and plant lovers are always searching for ways to strengthen root systems, improve plant resilience, and boost overall vitality. Today, we’re excited to introduce a new product that does exactly that — and more.

Phytoplankton + Cal-Mag is our latest innovation: 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.

If you already love the original MARPHYL Soil Enhancer, this upgraded formula brings a new level of support for structure, growth, and stress resistance, while maintaining the purity, sustainability, and plant-based origin that define our products.

 

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ONLY NOV 21 - DEC 1, 2025 | BUY WITH 20% OFF ON AMAZON.CA OR AMAZON.COM!

 

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Why Calcium and Magnesium Matter So Much for Plant Health

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

Calcium is critical for:

• 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.

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What Makes Phytoplankton + Cal-Mag Different

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 customers already trust.

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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

Whether you’re a home gardener or a commercial grower, Phytoplankton + Cal-Mag delivers consistent, reliable results with every application.

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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.

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When and How to Use Phytoplankton + Cal-Mag

Best application timing:
Early growth stages are ideal, as calcium and magnesium strongly support root development and structural formation. However, Phytoplankton + Cal-Mag can also be applied throughout the season to maintain plant health and resilience.

How to apply:
Dilute at a 1:20 ratio (1 part product to 20 parts water) and apply directly to soil or reservoir. Suitable for hydroponics, misting, and regular watering cycles.

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A Stronger Formula for Stronger Plants

With the launch of Phytoplankton + Cal-Mag, we’re expanding what plant nutrition can look like - combining the natural power of marine phytoplankton with essential structural nutrients that help plants thrive through every challenge.

Whether your goal is more vibrant foliage, healthier fruit, stronger roots, or simply an overall improvement in plant vigor, Phytoplankton + Cal-Mag is designed to help you grow with confidence.