Calamondin orange trees are native to China, but have thrived in Florida's hot and humid climate for 100 years. Because they produce edible, but also acidic and very small fruit---only 1 inch around---in the United States, you see calamondin oranges mostly growing as ornamental container citrus trees. You can start them from cuttings, but the easiest way to propagate calamondin orange trees at home is from seeds, which have three to five embryos each.
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Things you need
- Peat moss
- Planters, various sizes
- Clear plastic film
Collect the seeds from a calamondin orange when you're ready to plant. Leonard Perry of the University of Vermont Extension Service recommends using only fresh seeds when propagating citrus trees.
Mix one part peat moss and one part perlite to make your potting mix.
Fill seedling pots with your potting mix. Prepare one pot per seed.
Plant the seed to a depth twice its size. Water thoroughly and cover the pot with clear plastic film to retain heat and moisture in the soil.
Put your seed pots in a room that stays at 21.1 degrees Celsius. As soon as the seeds germinate in three to six weeks, remove the plastic cover.
Move your calamondin orange seedlings to where they will get plenty of natural light, but will also be protected from direct sun.
Transplant your seedlings to bigger containers as they grow. Begin by moving them to 4-inch planters when they sprout their third pair of leaves.
Apply potassium fertiliser to the soil once a month, always watering after fertilisation. According to the Texas Cooperative Extension Service, calamondin orange trees produce fruit year-round. They need regular feeding and watering through the winter.
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- University of Florida/IFAS Sarasota County Extension; "Florida Food Fare: Calamondin"; Mary King and Mary Jo Oswald
- University of Vermont Extension; "Growing Citrus as Houseplants"; Leonard Perry
- Texas Cooperative Extension; "Home Fruit Production - Miscellaneous Citrus"; Julian W. Sauls, PhD.; Dec 1998