Correction to Jan 4, 2018 "What's Wrong With This Picture?" article about pruning ornamental grass:
Many of the ornamental fescues, such as Blue Fescue (Festuca ovina ´Glauca´), do not do well in the southern heat and humidity. They are more suited for northern, less humid climates. As for the warm season grasses recommended, Upland River Oats (Chasmanthium latifolium), is a native grass but reseeds aggressively. Plant with this in mind as it can spread over the garden. Japanese Silver Grass (Miscanthus sinensis) and Pampas Grass (Cortaderia selloana) are NOT recommended for planting as both of these are non-native grasses with invasive habits. Perennial Fountain Grass (Pennisetum sp.) is another non-native that is being watched closely for aggressive behavior, but at this time, is still being recommended. Switch Grass (Panicum sp.) and Muhly Grass (Muhlenbergia capillaris) are both excellent native grass choices for planting in the landscape.
It is illegal to grow, distribute, sell, or plant Japanese bloodgrass (Imperata cylindrica 'Rubra') in South Carolina because it is the same species as cogongrass. Japanese bloodgrass will revert to the highly invasive green form, cogongrass (Imperata cylindrica). Any sightings of Japanese bloodgrass or cogongrass must be reported to the Clemson Department of Plant Industry at 864-646-2140 for positive identification and eradication. Possible locations for infestations of Japanese bloodgrass or cogongrass may also be emailed to the address below:
Please refer to the Ornamental Grass and Grass-like Plants fact sheet from the Clemson Extension Home and Garden Information Center for native and non-native grasses which do not exhibit an aggressive or invasive habit.
From the HGIC 1178 Ornamental Grasses and Grass-like Plants Fact Sheet:
"There are a number of undesirable or non-native invasive ornamental grasses that are commonly used in the landscape, such as maidengrass (Miscanthus sinense), pampas grass (Cortaderia selloana), Japanese bloodgrass (Imperata cylindrica 'Rubra'), giant reed (Arundo donax), and weeping lovegrass (Eragrostis curvula). These grasses reseed freely and are not recommended for use in the landscape due to their ability to escape into the natural environment. This in turn will displace native grasses and plants that are important as a food source for pollinating insects and other wildlife."