Originally posted by Werric:

My wife and I have 6 extractors now. We put 3 per root and when the root runs dry we move to another. I haven't been back to a previously dried up root to see if it has recharged but I will now. One thing is for sure once dried out with 3 extractors in them they definitely do not recharge.

We've finally found enough skulls to craft magic gear and all staves for both of us. Now for magic porridge.

They do in fact recharge( eventually) but you need to remove the extractors to let them recharge properly else, you'll just keep extracting at a reduced rate. Ideally, you don't want to put more than one extractor per root, and you want to try to find a location that has several roots in relatively close proximity so you can either drain them all concurrently, or rotate a single extractor from root to root. having multiple extractors on a root, does not make them extract faster, but DOES let them collectively hold more sap at any one time, typically taking a minute for one sap to be extracted regardless of the number of extractors set up, and once dry, the extraction rate slows to a crawl unless you remove the extractor and let the root recuperate over 4-5 days.

Each root holds ~25 sap or so, and replenishes slower than an extractor can pull from it, so at any given time, you've got about 25-30 minutes per root( independant of number of extractors) before you're best off just stowing the extractors in a chest under the root for a few days, and coming back to do it all over again.