Jonathan apples are semi tart and crisp. We have five of these trees at Rancho Pillow, which produce delicious apples without irrigation or fertilizer. We prune them once a year in January or February. They were sprayed once with copper and dormant oil (both organic) 2 years ago. Without regular spraying, we do have some issues with worms and scab, but we still harvest plenty of unblemished apples.