It can be grown in a pet's front or back garden by purchasing and planting the Pony Paradise Rainbow Tree Seed at the Outdoor Store & costs 9 Pet Society Cash. This tree was added on June 20, 2011. After planting, it will take 72 hours for the tree to reach maturity. Afterward, the tree will begin producing fruit, one fruit at a time, randomly. A pet can have up to three total fruits on the tree at once, unless you have the Fruit Fairy, in which case you can have four fruits.