I planted two longleaf pine trees today. I don't see them around here, they are more Carolinas area. But Home Depot said down to zone 7, so I'll see if they survive. Does anyone have any experience with longleaf pine in Pennsylvania? 
Discussion
No experience just know it’s typically found in the south. Hope it works out for you though! Love the tall pines. We’re a little north of you above Allentown