Beware of the fungal disease that is spreading rapidly in UK on busy lizzies - Thompson and Morgan informed us of it at their open day last month and everyone I know including myself) have lost theirs this year, the buds don't open, then drop off followed by the leaves and you are just left with bare stalks. I have grown them for years but no more ..... I will switch to growing the huge begonias which have come into their own recently, especially the "Illumination Apricot" trailing ones - in deep orange/peach shades, they are fabulous.