This is a nice combination thats working out this year - a black Sweet Potato Vine and a Geranium Johnson's Blue. The photo doesn't really do it justice, the purplish hue in both of them makes the harmonious pairing very pleasing to look at. I've flipped between the lime and the black potato vines over the last few years and I'm not going to bother with the lime one again, there just too much of it when it gets going and the color is a little too strident. I'll be attempting to store the tubers over the winter this year after reading this post.
