by DamJNeT » Fri Mar 04, 2016 2:11 am
2 or 3 explo and you start seeing them I think. With your early discoveries just put points in it then you're good to go.
According to the wiki you should be able to find taproot at 10per*explo, so you don't even have to spend LP to find some. Remember however that higher perception*exploration = you'll see more of them