Cannabis strains represent a wide variety of plant genetic lines, differing in origin, appearance, aromatic profile, and potential effects. Their development is the result of years of selective breeding aimed at combining different traits and creating new varieties with consistent characteristics. Modern strains are conventionally divided into indica, sativa, and hybrid, although in practice, most strains are of mixed genetic origin.

Indica strains are most often associated with a compact plant structure and rich, earthy, resinous aromas. Consumers often describe their effects as more relaxing and body-oriented. Sativa strains, on the other hand, typically have lighter, citrusy, or herbal notes, and are described in consumer reviews as more invigorating and stimulating. Hybrid strains combine traits of both strains and can exhibit a wide range of properties depending on the specific genetics.

One of the key factors determining a strain's characteristics is its terpene profile—the set of aromatic compounds responsible for its smell and flavor. Different terpene combinations create recognizable aromas: fruity, diesel, spicy, pine-like, sweet, or earthy. This gives each strain its own distinct character, prized by collectors and consumers ( marijuana seeds Ohio )