its outdoors in the summer, inside during the winter under a grow light. The pot has a drain hole in the middle. You think its root rot? Should i repot it you think its too far gone? Ive heard treating the roots with mycorhizzael fungus powder may be the way to go? Its just weird cause the other tree is doing pretty good and they were in the exact same situations. They get lots of sun in the summer almost like 10 hours they are in a wide open back yard and this year wasn't very wet so I augmented the watering like once every couple weeks with a deep soak, watering with a hose for like 2 mins a pot. The pots are kind of massive too 22'' wide and 28'' deep i think. Another issue i was having that I think after this batch of limes and lemons comes off the tree I need to prune the trees back and remove the support rod the trunks are too weak to support the weight of the trees.
