Hi Rosie.
Any of the “fermented” Reds are supposed to be good for sleep. Some vendors refer to them as “dark chocolate or dark something. Some vendors are very creative with names. Also Bentuangie has worked well for me. I have a few strains I rotate because you can build a tolerance if you always use the same one. With Kratom a small amount is energizing and a larger amount makes you relaxed and sleepy. I take 1 or 1 1/2 teaspoon of most nighttime strains. If you want information on what specific vendors and names of strains that work best for me for sleep please PM me and I’ll be happy to help you. Carol