I only wish i knew!
We moved into our house about 20 years ago. There were a few trees here then, two of which are these massive, gorgeous apple trees. They've been producing tons of apples for the past 20 years. I recall hearing that an apple tree is past its prime after 15 years, but these two trees made us 27 gallons just from the apples we could get without using a ladder! If we picked the trees clean we'd have well over 100 gallons just from those two trees. They taste amazing as well, so we really lucked out. Sweet and smooth, we use them for applesauce, cider, pies, everything.
Since then we've added many trees (we are up to about 28 now). We have many more apples, peaches (which I now use for peach wine
), pears, nectarines, plums, asian pears, white peaches, and kiwis. Yeah, apparently you can grow kiwis in PA.
I haven't seen any of those apples at local orchards, but to be fair I don't really look too closely. My apple trees kick ass so i've never needed to look elsewhere. I'll ask around, there are a ton of orchards in amish country.