What about making up a dream pillow or sachet for him to place under his pillow. Chamomile & lavender can help with sleep, there are crystals that can help, I used moonstone and angelite.Dream PIllows…Have you ever made one? This may have some helpful information in it also.
I hope the information from @christina4 helps too, those sound wonderful and I may just use some for my own sleep jar or sachet!