Hello everyone. Please help with thoughts on what to do with my Mango trees. I have two new trees (bought last summer and transplanted then into larger pots.) exhibiting the same problems. Both planted into a composted blend of cactus and citrus tree mix and fertilized with an organic fertilizer containing mycorrhizae. Location: San Diego, CA, about 4-5 miles from the coast. Against south facing fence line.

Strong new growth of leaves and even small flower bloom. Then the top leaves began to yellow a bit, wrinkle and some even curl/bend to one side or the other as seen in the pics. The leaves are not falling off, but no longer growing strong and thriving. Do not appear to be on progressing toward the look of the older, mature, green leaves below.

No visible signs of insects, other than the very occasional small ant. No whitening or other color. Some brown edges in a few places as can be seen.

Anyone seen this before? Please help and thanks in advance!
Jeramy