2026Expansion into additional crops and geographies (next)
2027North America geographic expansion
Current obstacles
Variable efficacy across soils and climatesFungal response depends on soil type and climate; requires region-specific validation.
Scaling production with high viabilityCulturing and storing fungi at scale while maintaining viability is difficult.
Building farmer and market acceptanceFarmers unfamiliar with biological treatments; carbon credit credibility still establishing.
Physics limits
Melanin production depends on plant carbon supplyThe fungi can only produce as much melanin as root exudates support. Poor crop growth, drought or nutrient deficiency reduce exudate supply and carbon sequestration.
Soil carbon gains can be reversed by tillage or oxidationAggressive tillage, erosion or exposure to anaerobic conditions can oxidize sequestered carbon back to CO2. Stability depends on continued reasonable soil management.
Carbon credit prices determine farmer ROIThe cost of CarbonBuilder plus verification is only justified if carbon credit prices remain strong. A crash in carbon prices would eliminate the economic incentive.
