Thank you for these plants update. Since there are no flowers yet but these leaves look similar to either something in the Salvia (sages) or Mentha (mints) genus. With gloved hands gently bruised some leaves, if this a type of mints, it should emit a minty aroma. When these blooms and you still don’t know, please resubmit with flowers photo; we could help you quickly for a confirmed ID of which genus. For now Check out the included link below on the medicinal use of mints (Mentha) for sleep aid. Again, until it flowers, both are only suggested genera. Best wishes! https://gardentherapy.ca/herbs-for-sleep/ https://gardentherapy.ca/herbs-for-sleep/