Bare-root apple and stone-fruit trees are a tempting bargain at nurseries now, but before making a selection, be sure it will produce fruit in your neighborhood. Most of these trees need a specific number of "chill hours" - when the temperature dips below 45 degrees - in order to flower and set fruit the following season. “Chill hours†vary widely across the county, and even within individual gardens. Let nursery pros know where you live to get the right tree for your neighborhood.