Indoor Phenotype

Indoor phenotype refers to plant expressions that develop under controlled indoor cultivation conditions, rather than a specific terpene compound. Environmental factors—lighting spectrum, humidity, temperature stability, and photoperiod control—shape how cannabis plants express their genetic potential, including terpene profiles. Plants grown indoors often display different cannabinoid and terpene ratios compared to their outdoor counterparts, even from identical genetics. This phenotypic variation occurs because indoor growers manipulate light cycles, CO₂ levels, and climate parameters that wild-type and outdoor plants experience unpredictably. Understanding indoor phenotypes is critical for breeders seeking consistent, reproducible genetic expression across generations.

Breeders stabilize indoor phenotypes by selecting plants that perform reliably under controlled conditions and express desired terpene profiles consistently across crops. This selection pressure has led to cannabis genetics specifically adapted for indoor environments, with altered growth rates, leaf-to-flower ratios, and secondary metabolite production compared to traditional outdoor or landrace