This all depends on the type of juicer and the size of the feed chute. A masticating juicer with a large circular feed chute can take a whole lemon or lime, but the citrus rinds would need to be peeled first. In most cases, we recommend cutting your citrus fruits into pieces to make life easier for your juicer. A manual citrus juicer requires you to simply slice the fruit in half before placing it on the cone.