I have one of these trees and have had it for about 3 years. It is not dying...but not growing. I have it planted in a 3-gallon plastic pot with a drain hole. I water it once a week and use a Earth based fertilizer. Any suggestions?
Calamondin Orange Tree
Certified GKH Gardening Expert
Your Calamondin should be planted in a large pot with a mixture of 1 part each potting soil, organic compost, and vermiculite.
Give the tree plenty of room for it's roots to spread out and establish a healthy root system.
The tree should be repotted every couple of years to prevent it from becoming root bound.
This may be the case with your tree showing no new growth.
Also refer to the care information in the link below to make corrections in fertilizing.