May be something in the Nettle family?

Pentas, could be. Also reminds me of my Salvia 'Amistad'. Grow it well, get some flowers, that will tell you.

Would be helpful to see the stem. If it's square it may be Salvia but not Pentas.

I thought it looked like lantana.

Thank you all. I checked and stem is square. So its Salvia (friendship sage) then? We'll wait for flowers.

There's no way of saying definitively what it is without more pictures. The sage was a possible suggestion, not an id.

Rub a leaf to see if the foliage is aromatic.

Leaf has very mild aroma of camphor.