Grimy guam

A grimy guam is a herb that has not yet been cleaned to make a clean guam. Grimy guams may be grown from a guam seed with a farming level of 9. It is dropped by certain NPCs. Cleaning a grimy guam requires a herblore level of 3 and gives 2.5 herblore experience. Clean guams are used to make Attack potions, Guthix rest teas(requires 2 clean guams) and Super fishing explosive with a herblore level of 3, a herblore level of 18 and a herblore level of 31 respectively. Grimy guams may also be obtained from the Sorceress's Garden minigame.

Obtain from
This herb is extremely common and is dropped by many monsters including the following:
 * Aberrant spectre
 * Catablepon
 * Cave crawler
 * Chaos druid
 * Chaos druid warrior
 * Cockroaches
 * Female H.A.M. member
 * Flesh crawler
 * Hobgoblin
 * Ice warrior
 * Kalphite worker
 * Killerwatt
 * Lesser demon
 * Man
 * Male H.A.M. member
 * Molanisk
 * Moss giant
 * Mugger
 * Otherworldly being
 * Sorebones
 * Turoth
 * Wall beast
 * Water Elemental
 * Zombie