We recently installed a rock pathway and want to fill the spaces between the stones with “step-able” plants that are low-growing and hardy. We planted some creeping thyme in the sunnier areas. I have seen Corsican mint used for this purpose in shady areas. Do you think it would do alright in southeastern Michigan?
Corsican mint (Mentha requienii) would definitely work and look nice for a very low growing (1/2 to 4 inch tall) ground cover between paving stones. The plant needs partial shade, and rich, moist soil that is well drained. It will not take drought because it is very shallow rooted. When stepped on (it will take foot traffic), it gives off a peppermint fragrance. It has small, light purple flowers in late spring and early summer. It is rated for zones 6 to 9, but many growers say it comes back in zone 5 (southeast lower Michigan). Remember it is a mint and will spread, but it is much better behaved than its relatives. It basically stays in its own area and can be controlled by removing the outside edges that have spread too far.