Originally posted by jonnin:

I have 3 roots at my sap/farm base and the first one barely regens by the time the third is dead, if that helps.
Thankfully, after an initial large quantity, you don't need that much of it.
You would need a LOT of handy roots to justify running more than 1 extractor.

Well you actually need hundreds of it... plus you may want to cumulate a bit more for the future update when they will let us upgrade the new gear that is currently topped at lvl 2.

And there is also some receipes which need the sap.