I'm looking at growing dwarf fruit trees in my greenhouse. For almost all the fruit trees, citrus, nectarines, peaches, etc, they require a period of dormancy, correct? How do I find the dormancy rates/temps/etc. of these type of trees? For example, citrus tree soil temp must reach 35-45 F for 6 weeks before being able to start the next growing season (I have no idea if that's right, just a made up example). Or, are there any fruit trees that don't require dormancy?