Start the Garcinia cambogia tree in spring for warmth and sunshine. Prepare a heavy 20-gallon pot with drainage holes for long-term growing. These trees reach over 10 to 15 feet in height, even in pots.
Mix your own potting soil with 1 part garden or potting soil to 1 part organic compost. These trees hail from rainforests and require the rich, crumbly and moist foundation of that environment. Lay 2 inches of gravel in the bottom of the pot, then fill the pot two-thirds full of potting mixture. Don't use soil from the garden, as it may bring weeds and disease into the pot.
Set the Garcinia cambogia tree's roots on the soil and pack more potting mixture over and around them. Plant the tree up to its crown and leave at least 3 inches of space between the soil surface and the top of the pot.
Put the tree in a site with full, bright sun and temperatures of 70 to 100 degrees Fahrenheit. These trees prefer hot, humid weather. Water the tree with 3 to 4 inches of water every week and spray the tree with water at every watering to maintain good humidity. Keep the tree outdoors during the height of summer but move it into the protection of the house well before any frost occurs.