Oranges and grapefruits bring fresh, zesty bursts of flavor, fragrance and color when Wisconsin’s produce still lies dormant. What’s more, the beauty of citrus runs so much more than skin deep.

With more than 2,500 types of citrus worldwide, it would be a shame to limit your larder to lemons and limes. Luckily, many grocers also stock seasonal stunners like Sumo mandarins, yuzu, and pomelos.

When I planted two grapefruit trees a number of years ago, I knew that I wanted a white variety, not a pink one. The pinks seemed to dominate the marketplace, and while their amber rose skin and blush ...