A bittercap mushroom (or bittercap) is a type of fungus. In-game they have a few different uses.
Dropping monsters
- For an exhaustive list of all known sources for this item, see here.
| Source | Combat level | Quantity | Rarity |
|---|---|---|---|
| Cockroach soldier | 52 | 1–3 | Rare |
| Fungal mages | 116 | 1 | Very rare |
Obtaining bittercap mushrooms
It may be grown from a bittercap mushroom spore (taking up to 240 minutes to grow) by players with level 53 Farming in the mushroom patch near Canifis and in the patch in Isafdar. This may yield up to six mushrooms.
Mushrooms are also dropped, one to three at a time, by cockroach soldiers. They are an uncommon drop.
Mushrooms do not usually sell very quickly. One counter-example is on 3 December 2009, when Jagex introduced fairy ring with code BJQ in the Ancient Cavern that must be planted with 5 mushrooms in order to function. This caused the mushrooms to sell extremely quickly around that time.
Players with at least 74 farming are advised against planting these, as growing Morchella mushrooms are far more profitable.
Uses
- Mushrooms may be added to a compost bin to make supercompost (requiring 15 mushrooms, or a combination of supercompost items).
- Five mushrooms are used to activate the fairy ring in the Ancient Cavern.
- Eight mushrooms may be used to pay a farmer to look after a whiteberry bush.
- Four mushrooms are the main ingredient for brewing Moonlight Mead.
- They can be used to make fried mushrooms.
- The value of one Mushroom in Mobilising Armies is 8 Investment Credits.
- Harvesting a bittercap mushroom is required for the "Fun Guy But Bitter" task in the Morytania medium task list.
| Farming |  Bittercap •  Morchella |
| Dungeoneering |  Edicap •  Gissel |
| Other |  Mushrooms •  Gorajian •  Mort myre fungus •  Button •  Black |
Farming produce | |
|---|---|
| Allotment produce | |
| Flower produce |
 Marigolds Rosemary Nasturtiums Woad leaf Limpwurt root Ruby harvest |
| Hops |
 Barley Hammerstone hops Asgarnian hops Jute fibre Yanillian hops Krandorian hops Wildblood hops Toad egg sac Grapes of Saradomin Grapes of Guthix Grapes of Zamorak |
| Bush produce |
 Redberries Cadava berries Dwellberries Jangerberries White berries Poison ivy berries Wishing well fruit |
| Tree produce |
 Leaves Oak leaves Willow leaves Maple leaves Yew leaves Magic leaves Willow branch Oak roots Willow roots Maple roots Yew roots Magic roots |
| Fruit tree produce |
 Cooking apple Banana Orange Curry leaf Pineapple Papaya fruit Coconut |
| Special produce |
 Evil turnip Bittercap mushroom Cactus spine Cave nightshade Calquat fruit Morchella mushroom Potato cactus |
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