To grow fruit trees you will need to obtain seeds found by lumberjacking anywhere in Faraan, these seeds can be identified with poppies dust and stored in seed keys.
Note: You must have at least 115 in lumberjacking skill to obtain these seeds.
There are 11 different trees to collect all of which produce resources used for cooking/smoothie making, they are as follows:
Once you have the seeds simply plant them in a plant bowl, these will grow in the usual way and will need to be tended daily to keep them healthy. When the plants reach day 10 you will receive a tree sapling as a resource in the plant menu.
Plant the sapling by double-clicking it and targeting the ground, the fruit trees will then produce resources which can be collected every half an hour by double-clicking the tree.