Q.Leaves Keep Falling Off My Lime and Lemon Tree
How do I prevent my leaves from falling off my lime and lemon trees? They are both in a wine barrel. Plus, some of my other trees’ leaves are turning yellow. How do I prevent this from happening?

Certified GKH Gardening Expert
It sounds like they are underwatered. Trees in containers need far more water than ones in the ground. If they are outdoors, they normally need to be watered at least once a day, twice a day if the temps are above 85F.
This article will help you understand more about the citrus trees losing their leaves:
https://www.gardeningknowhow.com/edible/fruits/citrus/leaves-falling-off-citrus-tree.htm