In botany, the term strain refers to variations found within plant cultivars. It also refers to the offspring that descend from modified plants. These plants are either produced by biotechnological methods or through regular breeding. ''Hemp'', the plant of the genus Cannabis or any part of the plant, whether growing or not, with a delta–9–tetrahydr... More is a strain of the One of the subspecies of cannabis is called Sativa and all hemp is classified as sativa. Aesthetically, varieties of can... More plant that is bred for industrial purposes. The recent demand for CBD products has led to hemp being bred to create strains that are extremely high in CBD and low in THC, or Tetrahydrocaannabinol, is the chemical responsible for most of the marijuana’s psychoactive effects. It behave... More. Only hemp strains that have less than 0.3% THC content are legal in the US.