How do you plant trees in Animal Crossing

First, you must have a fruit or a seedling. Then, dig a hole using your shovel. While facing the hole, open up your menu, click on the fruit or seedling, and you will have four options (three if it is a seedling). For a fruit: Eat, Bury, drop, and Cancel. For a seedling: Bury, drop, and cancel. Chose 'bury' while facing the hole, and your character will bury the fruit or seedling. You have successfully planted a tree. (Remember, if you want it to grow, water it once a day if it is in the summer or any other hot time).