Yellow vein chlorosis
Got a dwarf improved Meyer in early Feb. and planted into the ground where it gets direct sunlight about 6 hours a day, bright light the rest of the day. Blooming profusely, tons of little baby lemons, treated an ant/aphid infestation and now relatively insect-free.
When I got the tree, the newest leaves were thin and light green, almost white, but rather than go overboard with trying to fix anything I decided to pretty much leave it be for awhile. Those leaves haven't changed at all but now I've got yellow vein chlorosis on the lower leaves. The leaf stays green but the veins turn yellow and hte leaf eventually drops. What causes this, and should I do something about it?