Thanks for the tips Eric.
I still have only one solitary flower on one clump of my Asters
Lots of buds so, when they decide to flower
, I'll try the settings you and Malcolm have given.
They are fantastic plants, aren't they!
I particularly like them for a number of reasons - they hold their own against weeds, they don't need staked (being woody), they have a very neat form even when not in bloom and they give spectacular display.