What is Phenotype?

In cannabis cultivation, phenotype refers to the observable physical characteristics and traits that a plant expresses based on its genetic makeup and environmental factors. While genotype represents the plant's genetic code, phenotype is what you actually see and experience – the plant's appearance, growth patterns, cannabinoid profiles, terpene production, flowering time, and overall structure. Cannabis phenotypes can vary significantly even among plants grown from the same strain or genetic line. For example, a single Purple Punch seed batch might produce plants with different heights, bud structures, purple coloration intensity, and THC concentrations ranging from 18-25%. This genetic diversity occurs because most cannabis strains are hybrids containing multiple genetic expressions. Key phenotypic traits include: **Physical characteristics**: Plant height, leaf shape, internodal spacing, and bud density **Chemical composition**: THC/CBD ratios, terpene profiles affecting aroma and flavor **Growth patterns**: Flowering time (typically 7-10 weeks for most strains), yield potential, and resistance to pests or diseases **Environmental responses**: How plants react to light, temperature, humidity, and nutrients Commercial cultivators often "pheno hunt" – growing multiple plants from the same genetic line to identify superior phenotypes with desired traits like higher potency, better yields, or specific flavor profiles. Elite phenotypes are then cloned to maintain consistency across harvests. Environmental factors significantly influence phenotype expression. Temperature fluctuations can trigger purple coloration in genetically predisposed plants, while light intensity affects cannabinoid production. Nutrition levels impact plant structure and resin production. Understanding phenotypes is crucial for both cultivators and consumers. Cultivators use this knowledge to optimize growing conditions and select breeding stock, while consumers benefit from understanding why the same strain might produce different experiences across different batches or producers. This genetic diversity contributes to cannabis's rich variety and allows for targeted cultivation of specific therapeutic or recreational properties.