Missing Herbs

Hi all,
I try to improve my herbalism skill in Elwynn Forest, but it is almost out of herbs.
I also install Gatherer addon - it shows me herbs location but I there is nothing.
In one hour I gathered 10 Silverleafes walking around Elwynn Forest.
Does anyone know what is going on? ;/

Low level zones on Lordaeron doesn't spawn herbs or veins as they should. I can't remember how it works for herbalism on alliance, but I think Dun Murog(Dwarf starting area) has a lot more spawns. You could try checking it out there