Leaf chlorosis remedy

Hello, our young pillar oak has been showing signs of leaf chlorosis for two seasons. I applied Aluminum sulfite last year with no visible improvement, and earlier this season I sprinkled two applications of chelated iron. Is there anything else…

Periwinkle

One periwinkle in flower box size 3” x20”x 6” deep. Full growth with 8” branches. Roots starting to come to surface. Can I trim or have to replant. Not sure what to do…