Space the plugs 6 inches apart, and the rows 3 feet apart. You can tighten this spacing for water diversions or steep dangerous situations. Prep ground either by cutting low to the ground or by removing weeds. Fertilize each hole and then mulch. Water daily for first two weeks, and every other day for the next month if no rain. Keep weed-free for the first year, and then just trim and weed annually to keep the vetiver lush.