Bulk Organic Seaweed Fertilizer

Locally sourced Rockweed seaweed fertilizer from Maine’s cold, clean waters is eco-friendly, sustainable and adds naturally occurring nutrients and trace minerals from the ocean right to your garden. If you’ve been gardening for a while, you’ve likely heard about the benefits of using seaweed in your garden. But, if you’re a gardening newbie, or you’re just curious to learn more about the benefits of using organic seaweed fertilizer, here’s a little more information.
Why do people use organic seaweed fertilizer in home gardens? For starters, plants love seaweed fertilizer because it’s filled with essential plant nutrients like nitrogen, phosphorus, potassium, calcium and magnesium. Nourishing the soil with macronutrients is key to building healthy garden soil for productive crops.

Which plants like seaweed fertilizer? Lots of them! Seaweed fertilizer is beneficial to fruits and vegetables like tomatoes, apples, sweet corn, potatoes, peppers, strawberries, cucumbers and okra, just to name a few. The natural occurring elements in seaweed – AKA “the good stuff” – helps promote plant growth and strong root development.

What about pests? Does seaweed fertilizer help gardeners manage those pesky critters? Gardeners worried about preventing pests like slugs and earwigs can rest a little easier when using seaweed fertilizer. The naturally high salt content in seaweed makes it the perfect fertilizer for keeping your garden free from those meddlesome bugs. Not only does the salt in seaweed fertilizer repel slugs and earwigs, but when this organic fertilizer starts drying out, it creates a slightly crunchy surface on the top soil which slugs will avoid.

The best organic fertilizers are the ones that come from Mother Nature herself! Healthier soil means healthier food and a healthier planet. Heal your garden with Seaweed Kings’ organic seaweed fertilizer. It’s good for plants, good for the earth and good for you.

Nutrients & Benefits

Vitamins and Minerals

  • low levels of nitrogen (N)
  • Phosphorus (P)
  • Phosphorus (P)
  • And some residues of micronutrients


  • Soil Structure
  • Microbes Thrive
  • Microbes Thrive
  • Sustainable and Environmentally Friendly
  • Reduce Fertilizers and Pesticides
  • Plant Damage Threat Avoided

* These statements have not been evaluated by the Food and Drug Administration. The products on our site are not intended to diagnose, treat, cure or prevent any disease. Information on this site is provided for informational purposes only. It is not meant to substitute for medical advice from your physician or other medical professional. You should not use the information contained herein for diagnosing or treating a health problem or disease, or prescribing any medication. Carefully read all product documentation. If you have or suspect that you have a medical problem, promptly contact your regular health care provider.