To do something useful in the night. With the poppys, nettles, thistles you can buy everything at the shopkeeper, bowmaster, blacksmith…
When making sprints you get breathless. The field of vision gets black at the edge.
But this also happens on the horse when riding.
The herbwoman goes after one day to the soldier camp (no mater if you call her for help at burned farm). After this you can´t finish the Jerry quest. She send you for charcole, thistles and nettles, but after this she doesn´t speak anymore…