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' 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' apart in rows 3' 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.