Jangerberries

Jangerberries are used in Herblore to make Zamorak potions. They can also be eaten and heal 2 hitpoints, temporarily raise your attack level by 2 and strength level by 1 and restore 1 Prayer point. They spawn on a small Ogre island west of Yanille. (This island requires that you take a rope each time you want to get onto it, and a Mith grapple will not work in place of a rope.) Jangerberries can also be grown using Jangerberry seeds with the Farming skill at level 48 Farming, a player can pay the farmer 6 watermelons to look after the bush. They can also be used to make supercompost.

When planted, players will receive 50 experience and 285 experience for checking the bush's health. Players will then get 19 experience for harvesting each Jangerberry, that's 76 experience for harvesting a fully grown Jangerberry Bush.

They are also used in the Watchtower quest and can be randomly selected as an item needed in the quest Fairytale I - Growing Pains.