Sunday, May 26, 2013

Replacing Grass with Grass

Some of the work we do in the meadow is less than glamorous.

Lately we've been working to eradicate Bermuda grass—an invasive plant from the Eastern Hemisphere with an aggressive root system. According to Wikipedia, Bermuda grass is so called because it is incredibly invasive there, and is probably the point from which it entered North America. Bermuda grass spreads quickly in sunny areas, forming a dense mat that chokes out existing plants and prevents the growth of anything else. As far as I know, Bermuda grass does not provide food or habitat for any native Tennessee wildlife.

To eradicate the grass, you have to make sure to remove all the roots, and pile them on top of concrete or something so they'll dry out. If even a tiny piece remains in the ground, the grass can soon reestablish itself. The roots run deep into the clay, and are super brittle. Trying to kill it—without poisons, of course—is a lot of hot, tedious, unrewarding, cussing-under-your-breath work.

Our strategy is to get as much of the root system as we can, then pile a lot of mulch on top of the area we just weeded. A week later we will do another sweep. The loose mulch makes it easier to pull up the new growth from the inevitable roots we accidentally left behind.

Besides doing our best to kill grass, we are also planting grass.

Brian Campbell, horticulturist at the Knoxville Botanical Gardens and Arboretum, and champion of the Butterfly Conservation Meadow, donated a couple flats of native grasses and other plants grown from seeds collected at Cades Cove. The flats consist of tiny plugs of potting soil with baby sprouted grasses sticking out the top. More than one person has remarked they are oddly adorable. Please see photo below.



Among the species we have planted in the meadow are little bluestem and big bluestem, bunch-style prairie grasses that have grown in Cades Cove since prehistoric times. This prairie grass was mostly displaced by fescue and other livestock forage grasses planted by European settlers. Park employees are now working to reestablish the native grassland.

Bluestem grasses provide food and habitat for small animals and birds including quail. Could it be possible to attract quail to Parkridge?


We are planting these grasses into the clay in the center of the lot where the house burned. Hopefully they'll make it. Grow little grass plugs, grow.