Big Compost Bin

A Big Compost Bin is found in the first tier of Farming Guild and can hold 30 compostable items, double that of a regular compost bin. Compost takes about 90 minutes to decompose inside the bin. A full bin of regular compost can be turned into supercompost with 1 dose of compost potion, and a total of 50 volcanic ashes must be used to convert the contents to ultracompost after the bin has been fully composted. Note: The full 50 volcanic ash will be used when converting to ultracompost despite how many buckets of compost are left in the bin before converting.

• Compost, made by rotting weeds and low level farming products.
• Supercompost, made by rotting high level farming products (see below). Using a compost potion on a bin of regular compost will also turn it into supercompost.
  • Ultracompost, made by using 50 volcanic ash on a bin of supercompost.

Players may use an item on a farmer to check whether the item will make compost or supercompost. The following items will always make supercompost.

• Watermelons (grow on adjacent allotment and put directly in bin)
• Snape grass
• Pineapples
  • Pick in Brimhaven
  • Buy from charter ship shops in Catherby, Grand Tree Groceries, or Cobado's Groceries for a few coins each
  • Grow them from pineapple plants
• Calquat fruit (a cheap supercompost-able item)
• Bittercap mushrooms (grow in mushroom patch west of Canifis)
• Tree roots (obtained when a tree is dug up from a tree patch)
• Coconut shells (use the empty coconut shell, which is otherwise useless)
• Papaya fruit
• Jangerberries (respawn on ogre island, west of Yanille; not recommended as they are expensive)
• White berries (not recommended as they are expensive)
• Poison ivy berries
• Herbs excluding guam leaf, rogue's purse, snake weed, tarromin, marrentill, harralander, and ranarr weed.
• White tree fruit (after Garden of Tranquillity)

Taking 6 Baskets of apples and emptying them at the Bin allows the entire Bin to be filled in 1 Trip. The baskets can be easily filled for Ironman with access to the Culinaromancer's Chest. In combination with 1 dose of compost potion and 50 volcanic ashes the compost can easily be converted to ultracompost.

Product		Members	Facility	Skills	XP	Materials
	30 × Compost (Big compost bin)		Big Compost Bin	45	4.5	30 × Weeds 30 × Bucket
	30 × Rotten tomato (Big compost bin)		Big Compost Bin	45	4.5	30 × Tomato
	30 × Supercompost (Big compost bin)		Big Compost Bin	45	8.5	30 × Watermelon 30 × Bucket
	30 × Supercompost (Compost potion (big bin))		Big Compost Bin	45	8.5	30 × Weeds 1 × Compost potion(1) 30 × Bucket
	30 × Ultracompost (Big compost bin)		Big Compost Bin	45	10	30 × Watermelon 50 × Volcanic ash 30 × Bucket
	30 × Ultracompost (Compost potion (big bin))		Big Compost Bin	45	10	30 × Weeds 1 × Compost potion(1) 50 × Volcanic ash 30 × Bucket