I have had my calamondin tree for almost 30 yrs. It is in a large pot and I summer it outside and then bring it inside for the winter. The plant has flowers & produced fruit en mass every year. The plant is approx. 3.5' tall (and has been pruned in Jan in past years) I had big plans to make jam from the fruit this year.
This year it was covered with fruit when I brought it inside for the first frost. It lost a few leaves/fruit immediately as it has done in the past. I wrote this off to shock. However, the leaves have continued to fall. All of the green fruit has now fallen off. The plant has maybe 25% of its original leaves and the branches themselves are dying. The leaves are green when they fall. The remaining leaves will fall shortly, I'm sure.
I water just has I have for the past 30 years....soak and then let dry out in between waterings. I fertilized just as I have in the past with a citrus fertilizer.
The only strange thing I have noticed is a couple of leaves have been eaten. I do not see evidence of any bugs on it now though. The plant does not get a huge amount of sun when inside, but that hasn't changed from past years.
Can I take one of the remaining green branches and try to root it? Will a plant coming from a branch eventually produce fruit? Any advice?