Issue #1229 was marked as a duplicate of this issue.
Still no fix :( Some ppl got it to 600 by farming whiptail in uldum because it's still green. But it means 1 point in herb for 6-10 herbs gathered.. I got maybe 15-20 points there after 4-5 runs :( But it's not the way.. Twilight got even yellow herbs but there is so few, and last time i was there there was nothing (maybe bug - some reported missing nodes/herbs).