If the tree was on your property then you are. If it was on theirs , then they are.
Yes, New Jersey does grow blueberries. If you are planing to grow blueberries in NJ or the New England states i would suggest that you buy a winter hardy plant type.
Lambertville, NJ
yes
they grow blueberrys mostly in suburban farms near ocean city
Hamilton Township Senior Center have classes but i'm not sure if they charge 409 Cypress Ln, Hamilton, NJ - (609) 890-3686
South Orange, NJ
yes but you have to stay away from the sea
The Lenni-lenape lived there in NJ (called the Delaware by the European).
The tree, generally a Norway Spruce, is sourced from tree farms in New England and eastern Canada. The 2010 tree comes from Mahopac, NY.
Sayreville, NJ
the port athority of ny and nj