Any particular colors?

Also, are you staggering your plantings according to their bloom time to guarantee harvest of all of them at that time?

Quick recommendations: dahlias, hanging amaranthus - great for adding color and drama, stock - color and scent, calendula, lilies - asiatic, oriental, calla... etc. - for foliage... dusty miller, ferns... pretty much anything that isn't toxic or super water sensitive - tree leaves can be great - considering your getting a lot of leaf action on very little stem, which becomes important on hand-tied bouquets - which leads me to sunflowers - hint hint.