Anyone know what this is. It looks like a ground cover, it came up after buying a store-bought mulch. In one year it has taken over my garden, the roots are close to the surface. No flowers appear. I live in Ontario canada
As @Nic mentioned in his comment this should be ground elder. One of its dominant optical features is that the number three is the dominant number of leafs and forks it has.
For some more information about the plant click here.