You can plant small plants. As with all grasses, plant so the distance between the grasses is roughly equal to the height of the plant. If you want the grasses to fill in faster, plant them closer together or use larger plants. Annual grasses are an extra bonus for your garden. You can leave them in the beds after that old frost comes.
Many annual grasses offer winter interest through texture, added structure and subtle coloring.
It is strongly suggested that a bed is prepared for the grasses and that the grasses are not just planted in single holes. The bed should be tilled about 5-6 inches deep. Amendments and fertilizer should also be added if necessary. Make sure they get adequate water until they are fully established. Installation of Aquatic Plants Installation of aquatic plants is a fairly easy, but it can be a fairly mucky job.