Trees that are slow to fruit or bloom can be "ringed" - cut through the barkall the wat around the tree just after the time it should have bloomed, best to do two "rings" anout 3 to 5 in apart. This often sparkes the tree into fruiting the following year
Ed
Northumberland BerryWorks
707 Front Street
Northumberland, PA 17857
(570) 473-9910