I have a lemon tree that is 2 years old. It has wintered inside and did well last year, but now the leaves are not as vibrant and quite a few have fallen off in the last month. I don’t think I’m overwatering or underwatering, and it is in a south facing window. Still too cold to bring outside (I’m in RI) what can I do to help this plant?
Certified GKH Gardening Expert
A little bit of leaf loss is common when you bring outdoor plants inside - the change of humidity, temperature, and light can be a real shock.
If the leaf loss has started after the plant's been inside for a while, it's probably a watering problem. Citrus plants really do need a lot of water, and they often don't get it from the regular houseplant watering round. Especially if the container is big, the middle of the root ball may be completely dried out. Try giving your pot a good soak in the sink or bathtub, and keep an eye out for new leaf growth.
You can read up more on citrus watering here
And container grown lemon trees here