Filled plant pots are used in the Farming skill to turn tree seeds into seedlings. With the appropriate Farming level and a gardening trowel in their inventory, a player can create a seedling by using a tree seed on a filled plant pot. After watering a seedling with a watering can, a few minutes later it will sprout into a sapling and be ready for planting in a tree patch.
To fill a plant pot, with a gardening trowel in inventory use the empty plant pot on any farming patch that does not need weeding. The patch must be empty (no plants or weeds).
With filled plant pots are also available from farming shops for the same price as empty plant pots.