by Mashadar » Thu May 19, 2011 6:00 am
Well, you start seeing them at 500 per*exp (it is said that your chance to see a forageable is 25% at this point) and you see all of them at 2000 per*exp, so I guess you'll see every third rustroot or so.
Since rustroot is very common, you still should be able to find enough of them.