Search  for anything...

MARPHYL Organic Liquid Fertilizer - Outdoor & Indoor Plant Food - All-Purpose, Nutrient-Rich Lawn Fertilizer & Soil Enhancer for House Plants, Flowers, Vegetables, Succulents, Bamboo, Hydroponics

  • Based on 12,088 reviews
Condition: New
Checking for the best price...

Buy Now, Pay Later


As low as $4 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Aug 6
Order within 10 hours and 16 minutes
Available payment plans shown during checkout

Size: 16.9 oz


Features

  • SUPERIOR INDOOR PLANT FERTILIZER - MARPHYL Marine Phytoplankton is ideal as an outdoor and indoor plant fertilizer. It's an excellent vegetable fertilizer, houseplant fertilizer, and lawn fertilizer. It's great for your garden, greenhouse, and hydroponics. Enjoy gorgeous, colorful blooms with this exceptional flower food. Enhance soil quality and watch your trees, shrubs, vines, grass, plants, flowers, and vegetables thrive.
  • NATURAL INDOOR PLANT FOOD - Marine Phytoplankton are Microalgae full of nutrients, vitamins, and minerals. It's so much more than your average liquid plant fertilizer. MARPHYL's fertilizer for indoor plants and outdoor plants, grasses, trees, flowers and more, provides an astounding array of nutritional elements. Packed with vitamins, minerals, essential fatty acids, DHA, EPA, amino acids, chlorophyll, and a vast spectrum of phytochemicals, so your lawn, garden, and greenhouses will flourish
  • ORGANIC & SUSTAINABLE - Our Liquid Marine Phytoplankton Soil Enhancer is an organic, all purpose plant food that is harvested 100% naturally. It's vegan, non-toxic, non-GMO & sustainably made with no preservatives making it safe for vegetable gardening, ground water, and pets. It replenishes your soil on a regular basis to ensure the continued growth and beauty of your vegetation. Our organic plant fertilizer will meet your every need and provide a safe environment for all gardening.
  • MIRACULOUS & BENEFICIAL - Found in oceans across the world, marine phytoplankton are micro algae that infuse your plants, trees, grasses, and more with everything they need for health and longevity. High in potassium, nitrogen, and phosphorus as well as calcium and magnesium for lush foliage. Your lawn & garden will be the envy of the neighborhood, and your indoor plants will brighten your home.
  • EASY TO USE WATER SOLUBLE FERTILIZER - Simply mix a 1:20 ratio of our liquid plant fertilizer with water. Once in the water, stir, and then pour onto the plants. Perfect for use in small and large sprayers. Recommended use is every two weeks. You'll see the difference after just one application!

Brand: MARPHYL


Item Weight: 0.53 Kilograms


Item Form: Liquid


Coverage: Full


Liquid Volume: 500 Milliliters


Brand: MARPHYL


Item Weight: 0.53 Kilograms


Item Form: Liquid


Coverage: Full


Liquid Volume: 500 Milliliters


Mixing ratio: 120


Specific Uses For Product: Plant Food,Organic,Fertilizer,Vegetables garden


Target Species: Plants


Manufacturer: MARPHYL


Number of Items: 1


UPC: 627843783114


Unit Count: 16.9 Fluid Ounces


Product Dimensions: 2.44 x 2.44 x 7.68 inches


Item Weight: 1.17 pounds


Item model number: 500ml


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • AMAZING. brought new life to my plants.
Size: 16.9 oz
I am not one to usually buy new products for my plants. I have in the past, and it has bit me in the behind. Sometimes trying new products does more harm than good for my plants, but I needed to try something new after my birds of paradise was constantly infested with mites. My plants always struggle in the spring/summer as I live on the southern coast, so I wanted to see if I could find a more natural, unique alternative to more mainstream fertilizers/plant food. I decided to try this product out after doing a good amount of research and reading through other reviews, and I am so glad that I did. I decided to try this on all of my plants on my balcony, and within just a few days of using this product for the first time, all of my plants started spreading new growth for the first time in a long time. One of my cactuses that I’ve had for years bloomed for the first time after using this, and my birds of paradise sprouted new growth for the first time since the mites were under control. The packaging is nice, and has lasted me for several months given that it needs to be diluted with water. The smell is definitely something else, so I would recommend using this product in outdoor settings only, or taking your plants outside to use it. However, I can absolutely get past the smell given how well this stuff worked for my plants. as long as you are diluting this product correctly, and your plants are outside with drainage, you can drown them in this stuff. I believe the instructions say you can use it up to every two weeks, but I only feel the need to use it once every other month. it has brought new life back to my plants which have endlessly suffered in the Florida heat. I would absolutely recommend giving this a try. I will be buying again. ... show more
Reviewed in the United States on June 17, 2024 by Katherine

  • Happy plants!
Size: 16.9 oz
I have never noticed a huge difference when using fertilizer for my plants, and I can’t believe I’m saying this, but with this my plants looks more happy than ever! My moon valley pilea has never flowered before, honestly I didn’t know it could, and now it constantly flowers and has grown faster in the past 3 months than it has the past 2 years. I haven’t really noticed a difference with my two pothos, but they always have been happy so this may just be keeping them that way. I only use a little, but I think it goes a long way when used consistently. I’m almost out, and will be buying it again! ... show more
Reviewed in the United States on October 5, 2024 by Static

  • I love this MARPHYL Organic Liquid Fertilizer!
Size: 16.9 oz
I love this MARPHYL Organic Liquid Fertilizer! It seems to make my plants happier as shown in how they respond in color and strength shortly after using. I will need to make a purchase of a larger amount so I don't run out so soon. I tried the smaller bottle first, but it's worth getting the larger amount, I think, and wish I had done that. Hope your plants love it as well. ... show more
Reviewed in the United States on December 10, 2024 by Karen S

  • Marphyll is a Great fertilizer for sun and heat-beaten vegetable garden and flowers
Size: 1.05 gal
My back yard transition from little grass and big weeds plus 6 worthless cedar trees was completed around March 1st. New plantings all in early March. I did not realize that the landscaper did not add any nutrients to the soil, only the potting soil plants arrived in. The Pride of Barbados (pretty red and yellow flowers) were about 8" tall, the Elephant Ears were about 15" tall and several of the leaves were torn by hail and/or transport. Herbs and vegetables were planted in composted and fertilized organic raised bed soil and hardly grew an inch. I watered as recommended, and we had an uncharacteristic rainy month of May. Someone turned the heat on in early June (still on). Within 4 days of first fertilization with Marphyll, everything started to perk up, and about 6 weeks later these beautiful flowers are flourishing and the hummiongbirds love them. Everyone's veggies in South Texas back yards are finished by the end of June, but the herbs are still doing great. I used a 2 gallon watering can with a 20:1 mix of the liquid Marphyll. Everything got 1-2 cups (no, I didn't measure) followed be a big dose of water from the hose wielded by 9 year old grandson. Per instructions, we are doing this every 2 weeks. It's not difficult, but a bit tedious because I have a lot of plants. The odor is what you'd expect from a product dug up from the bottom of the ocean, fish poop and all. It is expensive, but seems worth it in my situation. Just purchased another batch. ... show more
Reviewed in the United States on July 10, 2023 by Paula29 Paula29

  • Best fertilizer for houseplants!
Size: 16.9 oz
Some reviews claim the smell of this product is too strong. It's not that bad at all and the odor doesn't linger after use. My monsteras produce so many new leaves when fed this product! So much height and fullness! I highly recommend this product. It was recommended to me by a master gardener for my houseplants and I'm so impressed by the results! ... show more
Reviewed in the United States on December 8, 2024 by MarknPhoenix

  • Don’t know
Size: 16.9 oz
I don’t know I used it yesterday. I’m waiting to see what will happen with my plants. It does stink really badly. But it does dissipate quite quickly after it’s put in water.
Reviewed in the United States on November 27, 2024 by Dirk Baum

  • My plants are THRIVING
Size: 16.9 oz
I've never been great with plants lol but I've been doing a lot of research and was recommended this. Not only are my plants staying alive now, they're growing beautifully! I got a pink princess back in August and it's doubled in size since then thanks to this.
Reviewed in the United States on February 27, 2025 by Alyssa Soileau

  • Great organic fertilizer!
Size: 16.9 oz
I really like this fertilizer. I wanted something safe and organic, and this could not be easier to use. Just pour into the water, stir and apply to plants. Easy, safe, and effective! Can't ask for more!
Reviewed in the United States on October 16, 2024 by Heather

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...