High level druidic edge to be able to gather a bit more herbs. So after you gather, you may find 2 sets of herbs, the other one at a much reduced duration.

Eg.
You begin to gather herbs from the surrounding foliage.
You finish gathering herbs.
You feel your protective supplications strengthen. (duration 100 hours)

With this edge, you have chances to get:
You also gather utility herbs from the surround foliage. (duration 60 hours)

Tab bit too powerful?

>High level druidic edge to be able to gather a bit more
>herbs. So after you gather, you may find 2 sets of herbs, the
>other one at a much reduced duration.

I added an edge that would increase the duration of found herbs. Adding additional herbs is a bit over the top.