Hi aisummers, sorry to hear about your pennyroyal. It is a fairly tough plant but I don't think it would take too kindly to be walked on. It might have been lack of water as it likes a fairly moist position. Full sun is not problem as long as water is in good supply. Are you sure they sold you the right thing?

Here is a link that might be useful: pennyroyal

Well hats probably why when I search for pennyroyal on the net I find the purple flowering one. I tried explaining this to my plant man and he told me he has never heard of a peenyroyal shrub with a purple flower only this ground cover on it smells like mint when steped on and it bounces back. Apparently the plant man said you coulsd eat this so called pennyroyal with mashed potatoes but its an abortive herb around pregent women.
The closest thing I have found is Corsican mint. Maybe he is confessed himself. This penny royal I am supose to have is only a couple of centermeters deep.

An alternative to grass is dwarf pennyroyal, which is a low growing mint. I used it in a small courtyard and it worked very well. It only needed mowing once a month and smelled wonderful. Also, it discourages fleas.

Here is a link that might be useful: carpeting herbs

When planted near brick pavers, you really need to keep the water up to it, and remember that the pavers absorb terrific amounts of heat if they are in full sun - this will be enough to cook any herb planted there! Pennyroyal is a mint, therefore in very hot climates will do better in partial shade.

I'm in rural central NY State, on the line between zones 4-5. I had some "dwarf pennyroyal" from a local nursery which I just love -- it was a VERY low to the ground plant, very green and very dense. You could walk on it and it felt just wonderful -- so thick and springy. It did not survive the winter, however, and when I went back for more, the nursery said their supplier didn't have it any more. I've been looking and looking, but I can't find this plant. I've had other pennyroyals, even ones that say they are "dwarf," but they weren't this plant. I looked at photos of "dwarf false pennyroyal" -- that's not it. It doesn't grow UP much at all, mostly just OUT -- it covered ground pretty fast and was wonderful for walking on it. Anyone have ideas where I could find it. Even better if it were just like that but could survive a New York winter.