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Supercompost detail.png

Supercompost is a superior version of compost that is used in the Farming skill to reduce the chance of a farming patch becoming diseased per growth stage by 6/7[1]. When used on a farming patch, each bucket grants 26 Farming experience.

In addition, it also increases the minimum yield and maximum number of harvests received from allotments, hops and herbs[2]. The minimum number of herbs per harvest increases to 5 (when compared with compost). This also applies to giant seaweed patches underwater[3] and Celastrus bark from a fully grown Celastrus seed[4].

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 does not 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.

Players can add two volcanic ash to a bucket of supercompost, or add 25 volcanic ash to a compost bin that contains supercompost, to upgrade it to ultracompost.

Obtaining[edit | edit source]

To create supercompost, players must place 15 suitable produce (see list below) into any of the compost bins that are located next to the allotment patches found around Gielinor. Once the bin is full, the lid of the compost bin must be closed to allow the contents to rot. This process takes approximately 90 minutes until completion, after which the player may open the compost bin and extract all of the supercompost by clicking on the bin or using buckets on it. Each bucket of supercompost collected grants the player 8.5 Farming experience.

Players may also use a compost potion to create supercompost. One dose of compost potion will change an entire finished bin of compost into supercompost, or one bucket of compost that has already been collected.

Supercompost can be purchased with reward points from the Tithe Farm minigame, for 5 points each.

The Lunar spell Fertile Soil can be used on a patch to apply the effect of supercompost to it without using any supercompost.

Suitable items[edit | edit source]

Item Cost to Fill Big Compost Bin
Pineapple.png: Inventory image of PineapplePineapple 1,965 3,930
Watermelon.png: Inventory image of WatermelonWatermelon 210 420
Coconut.png: Inventory image of CoconutCoconut 21,105 42,210
Papaya fruit.png: Inventory image of Papaya fruitPapaya fruit 12,075 24,150
Mushroom.png: Inventory image of MushroomMushroom 2,385 4,770
Poison ivy berries.png: Inventory image of Poison ivy berriesPoison ivy berries 1,590 3,180
Jangerberries.png: Inventory image of JangerberriesJangerberries 3,330 6,660
White berries.png: Inventory image of White berriesWhite berries 4,830 9,660
Toadflax.png: Inventory image of ToadflaxToadflax 25,155 50,310
Avantoe.png: Inventory image of AvantoeAvantoe 23,400 46,800
Kwuarm.png: Inventory image of KwuarmKwuarm 20,565 41,130
Snapdragon.png: Inventory image of SnapdragonSnapdragon 118,590 237,180
Cadantine.png: Inventory image of CadantineCadantine 20,775 41,550
Lantadyme.png: Inventory image of LantadymeLantadyme 17,955 35,910
Dwarf weed.png: Inventory image of Dwarf weedDwarf weed 7,695 15,390
Torstol.png: Inventory image of TorstolTorstol 112,890 225,780
Oak roots.png: Inventory image of Oak rootsOak roots 450 900
Willow roots.png: Inventory image of Willow rootsWillow roots 375 750
Maple roots.png: Inventory image of Maple rootsMaple roots 555 1,110
Yew roots.png: Inventory image of Yew rootsYew roots 2,415 4,830
Magic roots.png: Inventory image of Magic rootsMagic roots 13,365 26,730
Celastrus bark.png: Inventory image of Celastrus barkCelastrus bark 123,360 246,720
Calquat fruit.png: Inventory image of Calquat fruitCalquat fruit 900 1,800
White tree fruit.png: Inventory image of White tree fruitWhite tree fruit Not sold
White lily.png: Inventory image of White lilyWhite lily 15,015 30,030

Drop sources[edit | edit source]

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Ancient Wyvern210 Multicombat.png8–9 (noted)Uncommon
Ancient Zygomite109 Multicombat.png(noted)Common(~1/10)
Callisto470 Multicombat.png100 (noted)Uncommon
Earth impling36 Hunter icon.png(noted)Uncommon
Earth impling jarN/A Casket.png(noted)Uncommon
Venenatis464 Multicombat.png100 (noted)4.5/128
Vet'ion454 Multicombat.png100 (noted)Uncommon
Zygomite74; 86 Multicombat.png1–3 (noted)Uncommon

Store locations[edit | edit source]

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in stock
sold at
bought at
Farmer Gricoller's RewardsHosidius5N/AP2P icon.png

References[edit | edit source]

  1. Jagex. Mod Kieren's Twitter account. 8 September 2017. Mod Kieren: "So with the release of Ultracompost I figured I'd explain how compost affects crops dying. Sorry it is very word heavy! Fire any questions:)"
  2. Jagex. Mod Ash's Twitter account. 24 January 2019. Mod Ash: "[Flower/berry/cactus patches] don't depend on the compost state. Allotments, hops and herbs do."
  3. Jagex. Mod Ash's Twitter account. 72 July 2018. Mod Ash: "[Does compost increase giant seaweed yield?] Yeah."
  4. Jagex. Mod Ash's Twitter account. 24 January 2019. Mod Ash: "Yes, celastrus would be helped by composting."