Indica-dominant hybrids: short answer
An indica-dominant hybrid is a cannabis cultivar with more genetic lineage from indica populations than from sativa populations. Breeders write the split as a ratio: 60/40, 70/30, 80/20. The ratio describes ancestry. It does not fix the cannabinoid or terpene profile of the plant.
Where the terms come from
Jean-Baptiste Lamarck named Cannabis indica in 1785 from plants collected in India. Growers in the 1970s split the market into two groups. Indica meant short plants from Afghanistan, Pakistan, and northern India. Sativa meant tall plants from equatorial zones. Leaf width, height, and flowering weeks drove the split. Both groups sit inside Cannabis sativa L. under US law.
Cannabinoid numbers
THC-type indica hybrids test 15% to 25% delta-9 THC in flower, with CBD under 1%. Hemp cultivars test at or below 0.3% delta-9 THC on a dry weight basis, the limit set by the 2018 Farm Bill. CBD-dominant hemp lines test 8% to 20% CBD. Few hemp lines carry documented indica ancestry, so most "indica" CBD products refer to terpene blends added during formulation.
Terpenes
Myrcene, caryophyllene, linalool, and pinene appear in most indica-leaning lab reports. Terpinolene appears more in sativa-leaning lines. Total terpene content in dried flower runs 1% to 3% by weight in published tests. A 2022 study in Cannabis and Cannabinoid Research reported that terpene and cannabinoid content tracked with user-reported effects, while the indica or sativa label did not.
Reported effects
Survey data links indica-leaning cultivars to sedation, body relaxation, and appetite. Controlled trials that isolate the label as a variable are scarce. Sleep and anxiety claims for CBD sit outside FDA approval. The agency has approved one CBD drug, Epidiolex, for three seizure disorders.
How to read a CBD product label
- Batch number and a matching certificate of analysis.
- Delta-9 THC result, listed as a percentage of dry weight.
- Total CBD and total THC, not just the printed number.
- Terpene panel, if the brand claims an indica profile.
- Extract source: hemp flower, isolate, or broad-spectrum distillate.
A product with no batch COA gives no way to confirm the cannabinoid numbers. Ask for the document before purchase.