How old is your tree? Is it newly planted or well established? Have you had killing frosts this spring during budding time? Have you had a very dry spring? The answer to these questions should help members find an answer to yours. Very Best Regards.

Hi Jane and welcome to GoY.May has been extremely cold up here and April had cold spells too, it is possible the flower buds simply aborted but, as Loosestrife asks - how old is the tree and I would add - has it flowered before?