THC degrades in to CBN after the trichome turns cloudy and goes amber. THC is peaked when the trichs are big full round and clear. But we wait till they go cloudy to be sure of max production of all the cannabanoids. Once the trichomes start to degrade and go brown the plant has less potency. CBN is not responsible for “couch lock” at all. That is a forum myth. The different effects from different strains are due to the ratio and content of different canabanoids and
terpenes and posiibly flavanoids.
THC is psychoactive. CBN is not. And CBD is another canabanoid altogether. CBD also is not very psychoactive but has other medical properties. It does lessen the effects of thc though so trasitionally a high cbd content was not desirable. But a 1 to 1 cbd to thc ratio has become popular as medicine.
In my opinion high thc weed actually has better healing and pain reducing properties than cbd for most illnesses. Of course many parients dont want to be high so the market has introduced high cbd as a cure all. It is not.
Seizures are mitigated by high cbd though.
As far as sativas go i grow heavy sativa leaning plants all the time. I just harvested one. It has flowered for 13.5 weeks. The tricomes were mostly clear until a week ago and on harvest they were about 80% cloudy, 20% clear and a few amber degrading to brown.
I disagree with your information about this. I think its difficult to keep a finicky plant healthy for 13 weeks. But when I do the trichomes turn like any short flowering plant. Parience and careful feeding is key.
When the trichs get 80-90% cloudy a sativa will rip your head off with potency. No short flowering indica pheno of the month or supposedly elite clone ever can compete.
Longest I have gone with the seeds i have tried was 14 weeks. But these are still hybrids. Really all the popular “preservationist” supposed land race sativas sold are really hybrids. Like ace seeds and jordan of the islands. Even the locals where they are from were crossing them for generations.
Like mexican sativa brick weed in the 70’s. It has been bred for potency and yield like any weed by the growers. Last i had any was about 5 years ago. It was nothing like what we smoked in the 80’s.