Customer Favorites
Discover our best-selling fertilizers, soil amendments, and growing essentials, trusted by gardeners and growers to support healthy soil and thriving plants
Shop by Growth Stage
Every plant goes through several growth stages. Here's what to use at each one:
Every Stage
Use throughout your entire grow
Recommended products:
Germination
Support the first fragile moments of new life
Recommended products:
Seedling
Support roots through their most fragile stage
Recommended products:
Vegetative
Fuel the growth that builds the rest of the plant
Most recommended products:
Flowering
The stage where density, aroma, and yield are set
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Most companies feed the plant. We feed the ecosystem
Inspired by Terra Preta, an ancient Amazonian soil that grew richer with time, GreenGro builds biological solutions that make your soil stronger every season
Soil & Microbial Boosters
Water & Grow Essentials
Fertilizers
Pest & Plant Protection
Inspired by Ancient Soil Wisdom
GreenGro's story starts long before we opened in 2009 in Windsor, California. Inspired by ancient Amazonian communities that transformed naturally nutrient-poor soils into fertile, living ecosystems through Terra Preta, our approach is rooted in building healthier soil from the ground up.
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Our Story
While studying ancient Amazonian agriculture, where soils are naturally poor, Mark Ervin set out to understand how communities in this area were able to grow food successfully.
Terra Preta
In the Amazon, he learned of Terra Preta, a man-made soil system created by indigenous communities centuries ago
Regenerative System
Built using organic matter, charcoal, and living microbes, this system worked in harmony with nature and created a self-sustaining cycle of fertility
Everything You Need to Grow
Explore our growing kits and systems designed to make getting started simpler
