No, not margarita drinkers, lime-loving (calcicole) plants.
My neighbor planted up one my medium troughs for me this weekend with a mix of saxifrages and a silene the he had found at Oliver Nurseries. It's gorgeous, even in its newly planted phase. I've asked him to write up the details on the planting medium mix, the homemade "tufa" rocks, and the plants for the blog. Fingers crossed.