In his “Vegetable Feast” column, horticulturist Frank Hyman offers seasonal gardening advice paired with his own trademark wit.

Sweet Potatoes: Sweetheart of the Summer Garden

Both white potatoes and sweet potatoes are delicious, but sweet potatoes can be better for you: their orange flesh offers beta-carotene, fiber, and B vitamins, and they’re lower on the glycemic index. Some sweet potatoes have been bred to have white, yellow, or purple flesh. The young leaves are