Carambola and yellow leaves
I have a Kari carambola tree that is worrying me. It's my first time taking care of a tree, so I'm not really sure what I'm doing... I might be over-watering - I have trouble knowing when it needs water.
It keeps having lots of yellow leaves, and every other day or so it drops fruit. It is still putting out a ton of flowers (which the bees love) and has new leaf growth, but the yellow leaves worry me. Today it looked ok but the leaves looked a little wilty (as did the marigold and buckwheat growing in the same pot), so I watered a little bit and 8 hours later when I came home there were a bunch of yellow leaves!
It's in a large pot (not sure how many gallons - it's a 24 inch resin pot from Home Depot), which rests on a paver stone. It gets full sun for about 6-9 hours a day, and it's blocked from wind on one side by a wooden fence and a wall of trees and vines. It was fertilized about a week ago with 10-10-10.
Any advice on how to know when it needs water? What is more likely to make yellow leaves - over or under-watering? How much is "enough" water for an approx. 6 foot tall carambola in a 24 inch pot?