EJB,
We kept a log so I can tell you exactly. We put the taps in on February 19th. My original post on TBN was about when to tap. Turns out the local high school has a horticulture program and they tap. So I did it one day after them.We collected sap until march 14th. Our las boil down was on march 17th. We only have 5 maples. Everything else is mostly oak. I am waiting for the foliage to turn and I will see if there are any more.

I did learn a neat trick from the Rinck Mann book. I left my sap in a snow bank and it froze. The ice is relatively pure water and the remaining unfrozen sap is now more concentrated. So boil down was a lot less time.

Have fun.

Phil