The calamondin lime is a small, orange fruit with a tangy flavor. It is classified as a hybrid and known as Citrus mitis and C. madurensis. Among its common names are golden lime, Panama orange, Kalamansi and musk lime. In Thailand, it is called ma-nao-wan. Although it's considered a hybrid, the calamondin will grow true to type from seeds, which are easy to sprout and grow. Many people grow a calamondin in a container, which they keep outdoors in the summer and move indoors when temperatures begin to drop in the fall.
Collect the largest seeds from an existing fruit by cutting it open, squeezing the fruit and gathering the seeds. Rinse them in clear water and allow them to dry in a warm, dark, dry, well-ventilated area for several days.
Fill several small pots or a nursery flat with standard potting soil. Water the soil well and then make holes about ½ inch deep and 3 inches apart with a pencil or screwdriver. Drop one seed into each hole. Keep your pots or flat in a sunny spot. Keep the soil moist at all times.
Transplant seedlings to their own 1-gallon pots when they are 2 to 3 inches tall. When your young calamondin trees are 6 to 12 inches tall, you can transplant them again, either to a larger pot or to the garden.
Grow your calamondin in a large pot if you live in an area where winter temperatures drop to freezing. This enables you to move your tree indoors during cold weather. Fill a large pot with standard potting soil and then dig a planting hole large enough for the roots of your young calamondin. Set it into the hole, cover with additional potting soil and then water well until water comes out the drainage hole. Keep your tree in a sunny location from spring until fall.
Grow your calamondin outdoors in an area with well-draining soil if you live in an area where winter temperatures never drop to freezing. Dig compost and other organic materials, such as leaf mold or peat moss, into a planting hole about 1 foot deep by 1 foot wide. Use 1 part organic material for every 4 parts of soil. Set your calamondin into the hole, refill with the soil/compost mixture you dug out, and then water it well.