Organic Fertilizers/Liquid Fertilizers

Neptune's Harvest Seaweed Plant Food

Neptune's Harvest Seaweed Plant Food is an organic storehouse of over 60 naturally occurring major and minor nutrients and amino acids. It's growth promoting substances (Auxins, Cytokinins, Gibberellins) enhance plant development, color and vigor. Seaweed has also been found to increase plant hardiness and resistance to adverse environmental conditions, such as early frost, extreme heat and lack of moisture. Used as a seed inoculant, seaweed fertilizer increases and accelerates germination, and enhances the rapid development of a healthy root system. Seaweed is an excellent addition to any fertilization program.

Neptune's Harvest Seaweed (Kelp) Benefits

  • Soil nutrients are constantly being depleted through runoff due to over farming, tilling, development etc...All of these nutrients eventually run into the oceans, without a return path.  Seaweed provides a way to naturally return vital soil nutrients from the ocean back to your plants, trees and turf.
  • Seaweed contains many more nutrients than Standard N-P-K fertilizers. These additional nutrients address a wider array of deficiencies.
  • Organic fertilizers stimulate beneficial microbe growth.
  • The organic nutrients in Neptune’s Harvest organic fertilizers are naturally chelated. That makes them more bioavailable for plant consumption and they will remain in the soil for a much longer period.
  • Seaweed fertilizers are commercially proven to outperform synthetic fertilizers.
  • Seaweed fertilizers increase natural sugars (brix) in plants and turf, making them healthier and less susceptible to disease and insect damage.
  • Higher sugars (brix) also make fruits and vegetables taste better and have increased market value.
  • Flowers will have more plentiful and vivid colors and blooms, and these blooms will last longer.
  • Neptune’s Harvest is an excellent natural deer repellent.

Neptune’s Harvest Seaweed (Kelp) is organic and environmentally-friendly, can be used on all plants, trees and turfs and is safe for pets, animals and children.

Scientific References

• Seaweed extract benefits petunia, tomato transplants.

General Treatment Instructions

Use Neptune's Seaweed at a general rate of 2 to 2.5 gallons per acre (6 to 7.5 ounces per 1,000 square feet), 2 to 3 times per year.

Click Here For A More Detailed Application Chart


Neptune's Harvest Seaweed is Made from Pure, Rich North Atlantic Seaweed (Ascophyllum nodosum).

Available Sizes

Neptune's Harvest Seaweed Plant Food Organic• Pint
• Quart
• 1 Gallon
• 5 Gallon
• 55 Gallon Drum



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