Green Liriope
Liriope muscari - Liriope is a grass-like flowering plant that is mainly used as a ground cover border. Liriope is a tough adaptable plant that is maintenance-free once it is established. The grass-like leaves stay nice well into the winter months. They are evergreen in warmer climates and semi-evergreen in cooler growing zones.
Liriope will grow in full sun – it needs a bit more water there – in partial shade and in full shade. Light full shade is probably best, and only very dark, gloomy corners beneath evergreens will give problems. Add organic material like compost to the bed when planting, and mulch around the plants with more. Water at least weekly the first year, but after a couple you will find it is drought resistant. It grows well in the heat and humidity of zone 9 too.