Over here in New Brunswick, I have been getting a slow constant trickle for the past 3 weeks with 10hg of vacuum on 65 taps I was getting 30 gal/week. Last week I started getting 20 gal./day so I think the season is really just starting here. From the amount of snow on the ground and the long range forecast I am guessing that it will be at least the last week of April before I need to pull any taps, but only mother-nature knows the real snswer to that.