Brussels Sprouts are a nutritious, flavor packed crop that grow best in cool temperatures. Brussels Sprout plants have thick, trunk-like stalks that grow 2-3 ft. long, studded up and down with the edible sprouts, which look like baby cabbages. Each stalk may produce 50-100 sprouts. Plant the sprouts 2 ft. apart in rows 3 ft. apart. Provide at least an inch of water per week. Wait until after a few frosts to harvest. They'll be much milder-flavored and sweeter.