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Version 0.31: This article is up to date for the latest stable release of Dungeon Crawl Stone Soup.

Mulch is a term for ammo destruction in Crawl. Every time you fire or throw a unit of ammo, there is a chance that that unit will be mulched. The odds of this happening depends on the particular item used.

Brands also can affect mulch rates:

When boomerangs, javelins, or large rocks mulch, they deal an extra +33% damage.


  • Prior to 0.30, there was no bonus damage on mulch.
  • Prior to 0.29, ranged weapons had their own ammo: sling bullets, arrows, and bolts mulched 12.5% of the time. Stones also mulched only 12.5% of the time.
  • Prior to 0.24, Exploding ammo existed, which always mulched.
  • Prior to 0.16, steel ammo had a decreased mulch rate. Large rock mulch rate was increased in this version.
  • Prior to 0.11, enchantment bonuses were available on ammo, decreasing mulch rates.
  • Prior to 0.5, enchantment bonus did not increase a unit of ammo's odds of survival.