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My grandfather knew the same thing that his ancestors have known for centuries: Seaweed is a magical, natural additive for garden soil and a great source of vitamins and minerals for plants.


So, what will Grandpa Joe's Seaweed Secret do for you?


(Actually, nothing for you-but your plants get all this...)


  • Bigger and stronger root growth which makes your plants healthier

  • Improved seed germination (see the video)

  • Vitamins and minerals! Seaweed has more than 70 minerals, vitamins, and enzymes.

  • Increased chlorophyll production and photosynthesis to produce greener and stronger plants.

  • Improved crop yield and overall quality of fruits and vegetables with greater nutritional values

  • Greater resistance to attacks from pests and diseases.

  • Higher resistance to stress from extreme weather such as frost, drought and wind.

Picture of lawn watering with Grandpa Joe's Seaweed Secret
Grandpa Joe's Seaweed Secret is great for your lawn. Just use a hose sprayer with a mix ratio of 6 tablespoons to 1 gallon of water (to cover 1,000 sq. ft.) 

10 Uses For Grandpa Joe's

  1. Foliar application (which is a fancy term for "spray directly on to plant") is no doubt the best way of using Grandpa Joe's. In fact, our tests show Grandpa Joe's can be up to 20 times more effective when applied to the leaves then when broadcast on the soil. Use a mix ratio of 3 tablespoons per gallon of water. Spray as a fine mist until it drips off the plants’ surfaces and the plants will immediately absorb the fertilizer and begin to benefit from it by the second day.

  2. Lengthen the life of cut flowers by spraying them with Grandpa Joe's 48 hours before cutting.

  3. Use Grandpa Joe's as a soil conditioner. The alginates in the seaweed react with metals in the soil and form long and cross-linked polymers in the soil. These polymers improve the crumbing in the soil, and swell up when they get wet, and retain moisture for a long period.

  4. Treating seeds with Liquid Seaweed prior to planting will improve seed germination, root growth, and early seedling vigor. Soak seeds in a full strength of Grandpa Joe's for 20 minutes before planting.

  5. Use Grandpa Joe's as a rooting solution. Place cuttings in a solution of Grandpa Joe's and water until roots develop, then plant. When planting, water in with Grandpa Joe's solution.

  6. Extend the shelf life of your home-grown fruits and vegetables by spraying Grandpa Joes' on your crops 10 days before harvesting.

  7. Make your lawn greener and stronger by spraying Grandpa Joe's on your grass once a week. Use your hose sprayer with a mix ratio of 6 tablespoons to 1 gallon of water (to cover 1,000 sq. ft.) 

  8. Spray Grandpa Joe's in your compost bin to accelerate the composting process. Use a mix ratio of 1/4 cup per gallon of water and apply once a week.

  9. When transplanting plants from one pot or location to another, soak the roots in a solution of Grandpa Joe's to reduce transport shock and speed root growth.

  10. Have a plant that you're about to give up on? Try spraying Grandpa Joe's on the leaves and the plant's soil and watch it come back to life!

Supercharge your plants, flowers and lawn with Grandpa Joe's proprietary blend of seaweed and other organic materials from the coast of Maine.

Grandpa Joe's Seaweed Secret is not available in stores

If you are not happy with the results after using our Seaweed Secret, just return the bottle and we'll refund your full purchase price.

Grandpa Joe's is the "secret weapon" of many champion pumpkin growers.