Strong gatherer's potion

The Strong gatherer's potion is a one dose potion only available in the Dungeoneering skill. Using the potion boosts Woodcutting, Mining and Fishing by 6 + 6% of levels

It is made by adding Winter's grip and Red moss to a vial of water. This requires level 90 in Herblore and grants 234 experience in Herblore. This potion can only be made in dungeons with complexity level 5+.

Reference

 * RuneScape Game Guide: Dungeoneering - Herblore Tables