Release date 11 July 2005 (Update)
Members only? Yes
Quest item? No
Tradeable? Yes
Equipable? No
Stackable? No
High Alch 51 coins
Low Alch 34 coins
Destroy Drop
Store price 5 Tithe Farm points
(Farmer Gricoller)
Exchange price 599 coins (info)
Buy limit 600
Weight 3 kg
Super-good for the smallest or largest of plants.

Supercompost is a more potent version of compost and is used in conjunction with the Farming skill. Compost, super compost, and ultracompost reduce the chance of a player's crops becoming diseased whilst growing, as well as increasing the minimum number of crops that will be received by the player upon harvest, even if those crops are protected.

There are two methods to make supercompost. The first method is to place 15 suitable organic items (see below) into any of the compost bins that are located next to the allotment patches found around RuneScape. Once the suitable items have been added, and the lid of the compost bin closed, the contents will begin to rot, taking approximately 90 minutes until completion. During this time the player may not open the compost bin or add any more items. Once the super compost has finished rotting, the player may open the compost bin and extract all of the super compost by using a bucket on it. Each bucket of super compost collected by the player will grant that player 8.5 Farming experience. When used on a farming patch, each bucket will grant an additional 26 experience.The second method is to use a Compost Potion on regular Compost. Besides, a player can also use a Compost Potion on a filled compost bin containing regular compost to turn it into supercompost.

As a rule of thumb, supercompost should only be used on farming patches that produce a valuable harvest (such as high-level herbs) and/or provide significant experience for each item harvested (such as watermelons). Supercompost cannot increase the yield of trees, fruit trees, or bush patches. Therefore, it is not recommended to treat those patches with supercompost if you plan to pay a gardener to watch over them, since there is no benefit other than the extra 26 experience granted.

If the player has finished the quest Garden of Tranquillity or have enough points in Nightmare Zone, they can use a dose of compost potion to turn regular compost to supercompost either on bucket (1) or compost bin (15).

Supercompost can also be purchased with reward points from the Tithe Farm minigame, costing 5 points per bucket.

You can add 2 volcanic ash to a bucket of supercompost to obtain ultracompost or 25 volcanic ash to a full compost bin that contains supercompost.

Suitable itemsEdit

Item Cost to Fill
Pineapple Pineapple 2,505
Watermelon Watermelon 285
Coconut Coconut 2,280
Papaya fruit Papaya fruit 3,945
Mushroom Mushroom 1,245
Poison ivy berries Poison ivy berries 18,690
Jangerberries Jangerberries 3,960
White berries White berries 12,690
Kwuarm Kwuarm 32,880
Snapdragon Snapdragon 129,360
Dwarf weed Dwarf weed 11,070
Calquat fruit Calquat fruit 1,395