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Phosphorus is one of the most important nutrients for plant development — yet it’s also one of the most commonly deficient. Slow growth, small roots, weak flowering, and low yields often trace back to a simple problem: not enough available phosphorus in the soil.

To address this, we’re excited to introduce Phytoplankton + Phosphate,
a new fortified version of our signature marine phytoplankton soil
enhancer. This upgraded formula delivers a powerful boost of available
phosphorus while preserving everything people love about the original
product: its sustainability, full-spectrum minerals, and organic
certification.

Key functions of phosphorus

  • Energy transfer (ATP): The fuel behind all metabolic reactions
  • Root development: Critical for deep, strong, efficient roots
  • Flowering & fruiting: Determines bloom quantity, fruit set, and overall yield
  • Genetic integrity: Forms part of DNA and RNA
  • Nutrient uptake: Helps plants draw in and use water and mine

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.

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

WHAT PEOPLE SAY:

Description

Phytoplankton + Phosphate is designed for the mid and late stages, when plants demand higher phosphorus levels.

It’s especially effective for:

  • Flowering plants
  • Fruiting vegetables
  • Perennials and ornamentals
  • Root vegetables like carrots, beets, and radishes
  • Fruit trees and berry bushes
  • Hydroponic systems during bloom cycles

This makes it the perfect companion for gardeners transitioning from the vegetative to the reproductive phase of growth.

Still 100% Natural, Sustainable, and Ocean-Friendly

Just like the rest of our products, Phytoplankton + Phosphate 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.

NPK: 0.19 - 0.24 - 0.03

Guaranteed Analysis

Calcium | 420ppm | 0.042%
Magnesium/Magnésium | 1360ppm | 0.136%
Nitrogen/Azote | 1900ppm | 0.19%
Phosphorus/Phosphore | 2490ppm | 0.24%
Potassium | 314ppm | 0.0314%
Boron/Bore | 5.3ppm | 0.00053%
Iron/Fer | 4.3ppm | 0.00043%

PPM = Part per million

Benefits

Key benefits of the fortified formula

  • Accelerates root formation
  • Enhances flowering and bloom density
  • Supports fruit set and quality
  • Boosts energy production and overall plant vigor
  • Helps correct phosphorus deficiencies naturally
  • Improves water and nutrient uptake through better root architecture

For gardeners aiming for stronger
yields, healthier root crops, or vibrant flowering plants, this formula
provides a noticeable difference.

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