Note that this quest is a good way to catch up harvesting skill. It takes no skill to harvest the purple thyme, and each gather gets you a point of gathering skill.
Harvest the stuff, delete the quest, and horse ride to pick the quest up again. Wash, rinse and repeat until you can gather T6 (240 skill req)
Theres a better quest for this in Loping Plains. While on Recovery, you are told to pick Creeping Fortune. You can pick it as long as you want without restarting the quest, and it will skill up every pick from 0 to 315+ (315 was cap when I found this quest).