Flowers are useful in other ways too - I sowed some fantastic nasturtiums last year around my veg which clambered about all over the place and diverted all the blackfly. They were quite literally covered in the buggers - so the nasturtiums weren't very attractive themselves (and I certainly wasn't eating the flowers in salads as they tell you in magic la-la garden world the magazines) but they did a great job.
teta your flower garden sounds my kind of place although edibles are my first love. At the end of the last thread I was after ideas about my red/white/blue front garden and this morning I've been distracting myself from work researching on the RHS plant finder. So far my wish list is... (White) Lily of the valley, solomon's seals, clematis farges-something, Passiflora constance elliot, sweet peas, hellebore, campanula, Iris, Honesty, Gladioli, Nerine, Dianthus, (Blue) sweet peas, Iris, Vinca, Agastache, Astrantia, Gentiana, Lupin, Eryngium, Dracocephalum (Red) Gladioli, sweet peas, lamprocapnos, echinacea.... In my head this all fits in a parking-space sized patch, by the way. 
Couple of chilly nights we've just had here - last week's warm weather was nearly fooling me into thinking I could uncover things (salad, basically). Don't be tempted! I'll put my dwarf beans and other veg seeds out to harden off under the big cloche tonight though, so I've the space to do more seedlings on my windowsills. Must put up my advert at work soon to sell off seedlings.