When wild purslane came up on a slope of the property last year, it did good...until the deer ate it. I looked for it in the summer and couldn't even find any bare stems left. But the deer were literally starving, so I didn't mind. I had Missouri Primrose coming up back there also last spring and they ate it several times until I wasn't sure it there there was any alive. I piled some tree limbs over where it was and in fall it came back.