A grimy torstol is a herb that has not yet been cleaned to make a torstol. Grimy torstols may be grown from a torstol seed with a farming level of 85, granting 224.5 experience per herb during harvest. Cleaning a grimy torstol requires a Herblore level of 75 and gives 15 herblore experience. Clean torstols are used to make Super combat potions with a herblore level of 90 or Zamorak brews with a Herblore level of 78. Grimy torstol is one of the five herbs that cannot be obtained from the Sorceress's Garden.
Monster Combat level Quantity Rarity Skotizo 321 20 (noted) Common Ancient Zygomite 109 1 Common (~1/20) Spitting Wyvern 139 1 Uncommon Taloned Wyvern 147 1 Uncommon Long-tailed Wyvern 152 1 Uncommon Ancient Wyvern 210 1 Uncommon Cerberus 333 6 (noted) Uncommon Rune dragon 380 1 (noted) Uncommon Kalphite Queen 333 25 (noted) Rare