I believe the yellow one is Aurinia saxatilis...easy to grow from seed. I absolutely love it paired with my native Jacob's ladder. Here is a link that might be useful: A. saxatilis

Thank you for your quick response. Yes, it leaf out early in the spring during relatively high temp in Mar�12 and then got hit with cold temperature for few days. The leaves staring turning brown when the temp changed and I also applied fert spikes just before the cold temp. I will stick to your watering instructions as I read somewhere that watering once a week might help washing extra fert away from the roots. Any other advice as I need to save it....Thanks Again!

Agreeing w/ fawnridge - if this is an area where kids will be playing, mulch would likely be best for the most heavily trodden spots, since playing on it would probably kill anything else you plant. I keep the leaves under my live oak as a groundcover (& it seems to keep the acorns from sprouting), w/ borders of bromeliads & ferns. I have a few shrubs that seem to be doing ok in the heavy shade: firebush, justicia & Panama rose, and/ a red-orange Phillipine violet (Barleria repens) that is a rather invasive groudcover, but easy to pull up. Check out Floridata's plant list for info & lists of plants by desired features like shade, type, etc... Here is a link that might be useful: Floridata

Well, no one replied. I have a pile of topsoil/compost to distribute so I went ahead with my cardboard plan and made it 8 inches deep over the cardboard. Instead of just ground covers, I'm going to make it more like a garden. I'm going to use Nimbus geranium for the ground cover but also add in dwarf plumbago, hosta, fern, and blue-eyed grass.