posted 2 years ago
Welcome to the forum! It's normal to have some blemishes on the leaves and those are not hurting. Naturally young pawpaws are grown as understory trees with lots of shade. The excessive heat and full sun can be too stressful to the saplings planted in an open space. I saw the shade cloth on the first picture, do you have it for the other trees too? Also, it's not advised to fertilize plant when it's hot, and fertilizing later in the season will interfere with trees preparing for winter dormancy. To me, your trees look just fine and don't need fertilizer.
Zone 6, 45 inches precipitation, hard clay soil