Please help with my yuzu trees! They spent the winter outside and survived fine, I reported them into new pots about two weeks ago with well draining soil and a citrus fertilizer. They are in a south facing location and I try to water only when the top few inches of soil drys out. The leaves on my bigger tree have been curling downwards and falling off at an alarming rate. Some of the leaves have these brown spots on them that are perhaps sunburn. There looks like there is new growth but these leaves also have the brown spots. Some leaves have black spots. I have treated for potential pests using a spray with neem. My other smaller trees leaves are yellow but not falling off. They have received the exact same treatment. I’m in zone 8.