Coriander, mint and rosemary neded different conditions Mint likes damp shade, rosemary sun and a free draining soil and coriander likes whatever parsley likes... so you won't please al three in one window box, Depends on where the pots are going
For shade begonias and impatiens ferns and ivies and red and green baby lettuces for sun gazanias petunias, silver leaf, tomato plants lobelia, variegated thyme and purple basil, mesembryanthemum
for anywhere asters, antirhinums, coleus, alyssum, fuschias, lysymachia, bacopa, swan river dauisies, nasturtiums , perillia, nicotiana and sprinkle sonme night scented stock amongst them too Pansies and violas