organic-fertilizer
(2)
Nitricity
Nitricity is a Fremont, California climate-tech company turning air, water, renewable electricity and discarded almond shells into organic nitrogen fertilizer. Its flagship product, Ash Tea, replaces fossil-fuel-derived fertilizers with a regionally produced, OMRI- and CDFA-certified alternative that cuts emissions by more than 90%. Founded in 2018 by three Stanford PhDs, the company closed a $50M Series B in September 2025 and is building its first commercial plant in Delhi, California.
Kula Bio
Kula Bio is a Massachusetts climate-tech company turning naturally occurring nitrogen-fixing microbes into living fertilizer factories that run inside the soil. Born from Harvard chemist Dan Nocera's 'bionic leaf' research, the company supercharges Xanthobacter autotrophicus with a renewable-energy carbon source so the bacteria deliver plant-available nitrogen at the root zone, on demand. Field trials show its flagship Kula-N can replace as much as 80% of a farm's synthetic nitrogen use without the runoff or the fossil-fuel footprint of conventional fertilizer.