Without flowers & location (country, state, city, etc…)to help narrow down its ID. I ‘m taking a guess here, maybe one of the cultivars of creeping jenny (Lysimachia nummularia). Check out the included link below and see if you have a match. When it blooms and you still don’t know, plsease resubmit with photo of flowers. Best wishes! https://wholesalewaterlilies.com/products/aquatic-creeping-jenny-lysimachia-nummularia