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I don`t know that particular variety (I`m happy to say), but is it a large flowered variety? These are undoubtedly more prone to bud drop that the small flowered varieties, generally due to lack of air humidity rather than dryness at the root. We have had several very hot dry days recently, interspersed with a few dry windy ones, and this could be the reason. Try spraying with tepid water morning and late afternoon and see whether this does any good.I do occasionally get the same problem with my standards of Ballet Girl and Royal Velvet and the spray usually works with them.
Are the buds distorted ?? There is a new problem with fuchsias called fuchsia gall !!!It can also happen if you are over watering or over feeding them,can you show a piccy of the buds ???