You can choose flowers to match your colour scheme - brick red nasturtiums, bronze and yellow mixtures of nemesias, vivid blue nigella (love-in-a-mist), rich orange English marigolds
and, for the back of the border, tall annual chrysanthemums.
SOME annual flowers ( the half-hardy kinds such as love-in-a-mist, English marigolds
and stocks ( can also be grown early by being started under glass with heat, in a propagator or a cool, light room.
French and English marigolds
, salvias, geraniums, petunias, sweet peas and many others will keep blooming if the fading flowers are removed.