Bitter blue is a type of St. Augustine grass that is less coarse than typical varieties. It is dark blue-green and creates a dense, lush look to lawns. Bitter blue grass is a hardy plant that is tolerant of hot and cold extremes as well as ample shade. It grows at a very slow rate and needs to be mowed less frequently than other varieties of St. Augustine grass. One of the most cost effective ways to grow bitter blue grass is to purchase plugs and plant them throughout your yard.
Plant bitter blue grass plugs in a checkerboard pattern. Water the ground 24 hours before planting plugs and use a hand shovel to dig small indentations in the soil. Place one plug in each hole and backfill with dirt. The closer the plugs are together, the faster they will grow and fill in your lawn.
Water your bitter blue grass immediately after planting. Bitter blue grass needs regular watering—up to 5 inches a month during summers with little rainfall. Watering levels can be reduced to less than 2 inches a month during winter.
Fertilize your bitter blue grass once a month with a formula high in nitrogen. Regular applications of nitrogen-rich fertilizer increase the growth rate and keep blades a deep green color.
Mow your grass to a height of 3 to 4 inches. Increase the height by an inch during autumn months to allow more energy storage and a quick recovery in spring.
Monitor your lawn for chinch bugs, which can turn vast patches of grass yellow. Chinch bugs have small, black bodies and should be treated with insecticide.