Experts and BHG readers answer.
Ground Cover in Dry Area
Thanks for writing. The key is how dry the area is --- if it hardy ever gets rainfall and you don't intend to irrigate it, then you may not be able to grow anything. Even drought-tolerant plants need some moisture.
But if it does get some moisture, you can try bigroot geranium (Geranium macrorrhizum) or epimedium; they're both good groundcovers for shade and they tolerate drought.
---Justin, Senior Garden Editor, BHG.com