I'm planting a groundcover in a bed with a japanese maple and some shrubs. There are large oak and maple trees nearby as well, so the area is mostly shaded in summer, with some dappled sun at midday. What are your experiences with sweet woodruff? Does it look nice most of the time, or go dormant and look ugly in late summer? Is it invasive or controllable? If you have any alternate suggestions for groundcover or low plants, please feel free to suggest! Thanks.