This post is to answer questions regarding CBD in 'drug' landraces.
For high-CBD plants, it's best to search among populations of resin landraces, ie traditional strains bred for use as hashish or charas.
That means landrace strains from the Himalaya, Middle East, and Hindu Kush. These can be expected to exhibit CBD in approximately 75% of plants.
Evidence suggests that there are three basic chemotypes in traditional resin landrace crops:
1. Type 1 plants: high THC, low CBD
2. Type 2 plants: roughly equal THC and CBD
3. Type 3 plants: high CBD, low THC plants
'High' and 'low' are best understood to be ratios: some plants will have high overall cannabinoid content, some not. In a field of a hashish landrace, Type 2 plants might make up about half and Type 3 plants about a quarter.
By contrast, ganja (i.e., bud) landraces like Kerala or Manipuri seldom contain significant levels of CBD. This is because they have historically undergone more intensive selection for potency (i.e., THC) and this has bred out CBD.
A plant with good amounts of CBD can produce a more centred, clear, and stimulating experience than high THC plants do. For many, this means a more enjoyable high. Notably, the Lebanese has produced very high CBD plants, one of which is pictured below. Its sieved resin exhibited 19% CBD and 13.75% THC, as well as CBDV.