A ripe Jonathan apple in an old tree. As you can see, there's quite a bit of lichen on the branches.

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.