best brand for sleep problems

The best products for sleep issues aren't necessarily of a specific brand - I'd pay more attention to the cannabis strains and types of product.

Indica, or a hybrid that is Indica dominant, is really what you want for sleep. Many brands have one or two sleep specific products - flower, edibles, tinctures, etc - that are formulated for sleep and are labeled that way. I'd suggest searching for those. If you'd like a few specific product recommendations, let me know!