Controlled Deficit Irrigation

Controlled Deficit Irrigation (CDI) is a cultivation technique rather than an aroma or terpene profile, but it significantly influences cannabis plant physiology and secondary metabolite expression. By strategically withholding water during specific growth phases, growers modulate plant stress responses, which can shift terpene ratios and cannabinoid concentrations. CDI is commonly employed in regulated cannabis production to optimize resource efficiency while maintaining or enhancing aromatic compounds. The method requires precise monitoring of soil moisture, plant phenology, and environmental conditions to avoid crop loss. Breeders and commercial cultivators often evaluate cultivars under CDI protocols to identify genetics that express desired aromatic traits under mild to moderate water stress.

Breeding programs use CDI trials to select for drought-resilience and stress-response stability, identifying parent plants that maintain consistent terpene expression under water limitation. This data informs selection of cultivars suited to arid climates or sustainable, low-input production systems.