It can be invasive but the chamelon plant might do well as long as it doesn't spread into other parts of the garden. And its evergreen.

Interesting option. It would fit nicely and look good. I am very wary of its invasiveness and the site can be dry due to the slope. Do you think that black plastic edging would contain the roots? A little mulch would disguise the edging and make it manageable to cut back escapees.

If you are referring to Houttuynia cordata 'Chameleon', it's not the slightest bit evergreen in my zone 8 climate. And considering how widespread its appearance is after a period of winter dormancy, I'm about convinced someone manually digs up and intentionally spreads this thug around. I can't believe it travels that far. I would never legitimately consider planting this in the ground without significant controls.

The roots of this plant penetrate quite deeply. I'd opt for some sort of edging that would also penetrate deeper than standard lawn edging......something like metal flashing.

Good luck.......I wouldn't try it :-))

gardengal-thanks for the experience/warning. I am really torn. I am wanting an area of color and it will be isolated by a foot or two from other plants/grass. I can be pretty vigilant and persistent at making sure it behaves or eradicating it. But, I sure would like a better alternative. Because of the drought in Georgia, anything major may have to wait until the fall.