@conniepr27 I just saw this thread. I moved Sweet Woodruff from my old house to the new house in 2011. I just brought along a small start, probably about 4" in diameter. This picture was taken in the Spring of 2015. It does spread, but I have it in my "Woodland Garden" next to the timber so I was hoping it would spread. At the old house I planted about 1/2 dozen of them and they filled in an area I needed a good groundcover so I was very pleased.
This is the new garden in 2015:
This was the old garden in 2009-the Sweet Woodruff is around the base of the Redbud tree to the right of the bench:
Although it spreads nicely, I have not found it invasive or that it chokes out other plants.