GRAPEFRUIT used to be rare and exotic. My parents served them at dinner parties—I rather think they had a maraschino cherry in the middle. My father saved the seed and sowed it, too, although they never germinated—grapefruit need a higher temperature than we ever had in the vinery or greenhouse. But my family finds the temptation to grow fruit trees from seed is hard to resist.
When my diplomat daughter was working in Japan, we discovered the aromatic delights of yuzu. These are among the smaller citrus fruits, but their
