Brussels sprouts need a minimum of 6 hours of sunlight daily; more is better. They like fertile, well-drained, moist soils with plenty of organic matter. The soil pH should be on the high side of the range for vegetables, about 6.8, for optimum growth and to discourage clubroot disease. Brussels sprouts get large, so they need to be about 18 to 24 inches apart in a row or bed. If planted in rows, space rows 30 inches apart to give yourself enough room to walk. Brussels sprouts get large, so they need to be about 18 to 24 inches apart in a row or bed. If planted in rows, space rows 30 inches apart to give yourself enough room to walk.