Yommi tree seeds are a quest item used during the Legends' Quest. They are given to the player by Ungadulu after freeing him. The seeds must first be germinated in holy water to create Yommi tree seeds (germinated) before they can be grown into a Yommi tree, and to do this the player must perform a number of tasks in an underground dungeon. Once the tree has grown the player can cut a Yommi totem from it. 3 seeds are obtained from Ungadulu at a time. If the seeds are lost or planted incorrectly, one can ask Ungadulu for 3 more. The seeds require level 45 Herblore to plant. The tree grows at an amazing rate, but can be cut only with a rune hatchet, and must be cut quickly so as to prevent it from getting rotten. Gujuo will automatically remove any seeds the player has in their inventory or bank after the final battle with Nezikchened, so if the player wants to keep them after the quest they must drop them before killing Nezikchened.
- Yommi tree seeds and mithril seeds share the same inventory icon.