There are a few things to consider when choosing a strain for insomnia:
Insomnia can be an isolated condition or a symptom of another disorder: For most people, insomnia is caused by another condition (such as chronic pain, anxiety, depression, etc.), so it’s important to take this into consideration when choosing a strain. If your insomnia is caused by another condition, it’s important to seek out treatments, lifestyle changes, or strains that treat the underlying condition.
Every personal responds differently to strains. What works for Suzy, may not work for Joe. It may take a bit of trial-and-error before you find the right strain.
Intake method is as important as strain! Some people find vaporization works best for them. For others, they prefer oral administration (e.g. edibles). And, some people prefer to combine the two. For example, vaporization will affect you the most quickly, but the effects wear off faster, as well. If you have difficulty getting to sleep and staying asleep, “vaping” a small dose along with an edible may have the effect of helping you get to sleep faster, and with the edible, you can stay asleep longer.
Consider terpenes as much as strains. Strains -- even from the same producer -- often vary considerably in terms of chemical composition. Therefore, it’s important to find lab-tested strains that document cannabinoid and terpene content. Many people find strains that are high in terpenes like linalool and myrcene to work best. Strains considered Indica-dominant tend to have higher levels of myrcene, but this is a generalization, and not a hard and fast rule. But, if you look for strains that have at least .5% myrcene, they will be more sedative than strains with lower myrcene content (as myrcene seems to work synergistically with other cannabinoids like THC and CBD) to produce sleep-inducing effects.
Again, it may take a bit of trial-and-error until you find the ideal strain (and preferred intake method or methods). Further, given the variable consistency among strains and patient accessibility to medicine, rather than recommend specific strains, we suggest finding strains or products based on their chemical composition profile (per guidelines outlined above).