I was exposed to little of my grandmother's knowledge of natural remedies. She made up mint and camomile tea and cooled it to treat my infant son's first gas attack. That baby is now 38 and we are still using it. My husband was astonished to learn it really works.
I think any tea that relaxes you and/or contains melatonin will help with sleep, but I also believe the ritual helps.
Both my husband and my son have insomnia. They can't turn off their minds at night. Neither of them are willing to build any ritual to aid their sleep. They persist in doing all the things that make it harder to sleep.
I put a square of fabric dotted with a couple drops of lavender oil between my pillow and the pillowcase. Your body warms the lavender oil, the scent rises around you face and relaxes you. Your mind and body recognize that it is time to shutdown and rest.