Where I come from — the Deep South — iced tea is a religion. Traditionally, most Southern families make it with Lipton tea bags, a little lemon and a lot of sugar. The sole ingredient in those Lipton bags is black tea, which comes from the Camellia sinensis plant. The species was once grown on a limited commercial scale in the South, but today it’s produced primarily in Asia. Gardeners in mild-winter areas can grow the traditional “tea” plant (warning: it’s finicky), but green thumbs everywhere can easily grow perfectly suitable substitutes that combine into a delicious, caffeine-free iced tea.