Thanks for this great article. I've been adding more and more ground cover to my garden, and your article encourages me to do even more. I have a lovely area in the front garden that is covered with periwinkle entwined with different types of dead nettle and it gets more and more filled in every year. I've bought moneywort (it looks just like creeping jenny - I'm not sure if it's the same plant or not) for an area under the grape arbor, where little grass grows and so is susceptible to weed growth. I'm anxious to see how it will take off and fill in the bare spots.