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 Unique Gardening Ingredients. Better in Every Way.

  • Proven. Most product formulas used by professionals over 20 years. Over 20 million gallons applied, over 1 billion plants served.
 
  • Unique ingredients. Great Big Plants’ products are made with unique, all-natural ingredients that are missing from popular fertilizers and soil conditioners. Ingredients include kelp, humic and fulvic acids, beneficial microorganisms, a broad spectrum of bioavailable micronutrients, along with macro and minor nutrients. Most products are organic certified.
  • Fast Acting. Products are bioavailable or designed to have ingredients become bioavailable rapidly, thereby providing rapid benefit to soil ecology and plants. Liquid products flow to the root zone to begin working immediately.
  • Easy-to-use. Mix liquid products with water and pour on soil around base of plant. Till dry products into garden soil or apply with spreader. No heavy bags; no mess; no waste.
Featured Products

Great Big Plants Natural Compost Extract


  • Supplies ingredients missing from most fertilizers.
  • Easy-to-apply and fast acting
  • Root ready (bio available) liquid concentrate
  • All natural and certified organic
  • One quart makes 64 one pint doses

Our all-purpose formula, Great Big Plants Natural Compost Extract provides the same benefits as traditional dry compost, but does so faster and is much easier to use. Our compost extract provides a wide array of trace amounts of nutrients and micro-nutrients, plus kelp, humic acid and beneficial microorganisms. More info.

Ancient Liquid Humate


  • 2% bioavailable potassium
  • Enhances nutrient uptake
  • Encourages root growth
  • Improves soil structure

Green up your lawn and perk up your trees with Ancient Liquid Humate. We extract our humic and fulvic acids from long decayed plant matter. We add kelp to get a highly bio available source of carbon, potassium and trace amounts of other minor and major nutrients. More Info.


Healthy Plants grow in Healthy Soil!

Our products are based on fundamental soil science concepts:

Plants need nutrients that are bio available, or as we say “root-ready”. Any nutrients included in our products are either in a bio available form ready for root uptake, or can easily be converted by soil microorganisms to be root-ready.

Carbon in the soil needs to be replenished and is essential for nutrient uptake. It is widely accepted that the carbon content of soil is a major factor in its overall health. Carbon helps soil microorganisms thrive, improves soil structure and assists in nutrient uptake by the plant. The humic acid in our products is an excellent way to replenish or boost carbon in garden soil.

Plants need ingredients missing from most fertilizers. We supply the missing ingredients that help plants grow bigger and perform better. Our line of products include uncommon, but essential ingredients such as bio available nutrients, trace minerals, carbon and beneficial microorganisms.