"They are only supposed to put in the male tree -- it doesn't produce the berries -- but they've been putting in females, which is driving everybody nuts."ADDED: There are reports that a male ginkgo can turn female... or something:
I read an article that a Virginia study showed that male Ginkgos can morph into females. That is completely false. What happens is the grafted clone dies on the seeding rootstock and the rootstock sends up a shoot. If the tree farm is not carefully watching this, then nobody knows the "certified male" is no longer alive and they are selling plain ol’ Ginkgo. It happens a lot!