best potting medium for Key lime
What is the best potting medium for a Citrus hystrix - key lime tree?
Certified GKH Gardening Expert
You can use a good quality potting soil that includes 25% compost or potting soil formulated specifically for citrus trees.
Here is more information on its general care: https://www.gardeningknowhow.com/edible/fruits/lime/care-of-your-kaffir-lime-tree.htm