Heavy Metals Screening

Heavy metals screening refers to laboratory testing protocols that detect and quantify potentially harmful metallic compounds—including lead, cadmium, arsenic, and mercury—accumulated in cannabis plant tissues. Cannabis is a hyperaccumulator, meaning it readily absorbs heavy metals from soil, water, and growing media; screening helps ensure cultivars and finished products remain within regulatory compliance limits. Testing is performed via inductively coupled plasma mass spectrometry (ICP-MS) or similar analytical methods. This classification is critical for seed selection, cultivation environment assessment, and product safety verification across regulated markets. Breeders and cultivators increasingly screen genetics grown in specific terroirs to map metal uptake patterns and inform soil remediation or variety selection decisions.

Breeders working in regions with historical industrial activity or contaminated soils use heavy metals screening data to identify and select genetics with lower bioaccumulation profiles. This trait information informs long-term cultivation site planning and helps establish cultivar baselines for metal uptake tendencies.