Gulf cordgrass is a tall grass commonly found in area adjacent to the Gulf of Mexico. It also grows in warm marshes and swamps. It is used to help control erosion and as feed for animals, but only after it has been burnt. Gulf cordgrass is difficult to grow from seed, with only 30 percent of its seeds germinating. A more successful way to grow gulf cordgrass is to divide large clumps or grow new gulf cordgrass from cuttings.
Divide large clumps of cordgrass. Dig up clumps, being sure to get as much root as possible. Shake off any loose dirt and divide the grasses with your hands.
Alternatively, take cuttings of Gulf cordgrass and grow roots in a container of moist potting soil with drainage holes at the bottom. Set the pot in 1 inch of water for constant moisture. Refill as necessary. Dip the cutting first in an inch of a rooting hormone prior to potting for faster growth, if desired. Place the container in by a sunny window indoors or in a greenhouse.
Wait about 6-8 weeks to "harden" the cuttings. Hardening means to take the grasses outside each day in their current container for a little bit of time so they can acclimate to their new environment. Increase the time each day until the plants are strong enough to be transplanted outside. The hardening process may take a couple weeks.
Plant the divided grasses (from Step 1) or newly rooted grasses in soil that is usually wet. Water for the first few weeks, if necessary. Gulf cordgrass can tolerate soils that are sometimes submerged in water as well. Space evenly apart and over time, the grasses should grow larger and form larger clumps to fill in the gaps. You can later divide the large clumps again if needed.