When is the best time to fertilize fruit trees? In this episode Tree Fruit Production Extension Specialist Robert Crassweller, Ph.D. from Penn State College of Agricultural Sciences talks about how fruit trees' nutritional needs change throughout the seasons. Listeners that sent in questions or comments during the live show were entered into this month's contest to win Plant Partners: Science-Based Companion Planting Strategies for the Vegetable Garden (affiliate link) by Jessica Walliser.  Watch this 10-minute video excerpt from this episode on when to fertilize fruit trees.  The host of The Urban Forestry Radio Show and Podcast is Susan Poizner of the fruit tree care education website www.orchardpeople.com.  Tune into The Urban Forestry Radio Show LIVE by going to RealityRadio101.com on the last Tuesday of every month at 1.00 pm Eastern Time.Learn to grow organic fruit trees successfully. Sign up for OrchardPeople.com's premium online courses at https://learn.orchardpeople.com/.