I also have sweet potatoes which I started in a mound, but now there is no evidence of that(the bed is flat as a pancake). The vine is spreading like wildfire and I can't wait to see the end results! BTW when I put them in the ground, the tricky St. Louis weather flip flopped back into a cold strain but time and climbing temperatures gave the plant a second chance.
~Now I know tis the forever truth that "God made dirt so dirt don't hurt". It has already been kissed up to God~
~If you don't stand for something you'll fall for anything~