Grist: Think of your favorite fruits and you might think of the warm climates they tend to thrive in. Florida oranges, Texas grapefruit, California strawberries - and grapes, figs, pears, and apricots. But here`s the funny thing: Most fruit trees have to chill. Literally. Unless theyre tropical, trees have what are called "chilling requirements": They need winter temperatures to drop to within a certain range - usually just above freezing - and remain there for a set period of time.
This allows the...