When David and Janet Gilbertson moved to their farm in 2002, Janet told her husband she'd like to grow some apple trees...so David planted 400 of them! Since then the Gilbertsons have been adding trees every year at what has become Gilby's Nursery and Orchard in Aitkin. David Gilbertson talks about apple trees with knowledge and enthusiasm. He said it was a good winter for apple trees, and right now is the time to prune them. He recommends a 6-step pruning process: Gather tools: a bypass pruner