CBN is a very powerful muscle relaxant but it doesn’t improve sleep.
Scrolling through this thread KUSH and KUSH crosses keep popping up, and after growing my first Violet Kush auto from Garden of Green I gotta say it’s the best thing since sliced butter.
I believe the answer as to which cannabinoid or cannabinoid combination is most sleep inducing, will be found when comparing the cannabinoid profiles of many different KUSH varieties and seeing which ones they have in common.