Answer: Two of my favorite groundcovers (for the reasons you cite) are Ajuga (carpet bugle) and ivy (Hedera). Of the two, I'd choose Ajuga because of the seasonal flowers and variegated leaf patterns. Ajuga can be mowed after flowering, it spreads well, and will cover your bank in a short time. It's about as disease resistant and drought tolerant as you can get. Be sure to prepare the soil well prior to planting so the roots have an opportunity to become well established before hot summer weather arrives. Best wishes with your landscape!
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