Are roses her favorite flower? If not, you might win a few brownie points by going with a flower that she likes more.
Oh sure, like orchids, orange blossom, gardenia, magnolia, or imports from the Middle East, Africa, or Asia
. Or home grown, like lilacs.
I wouldn't recommend yellow roses in romance. Yellow reminds some people of bile. If she really likes yellow, it's better to give her a gift card and let her purchase them, to avoid bad luck in romance.
Unlike a bunch of daffodils or tulips, a single nested, wrapped red rose with a generous stem brings to mind something that stands tall, firm, and hot. Let alone 3, 6, 12 or more...
Why not shake it up. Out here, it doesn't cost extra to ask the designer in back to pair your wife's favorite flower with some roses and filler (baby's breath, greens). Daffodils go with white, coral or peach roses. Sunset colored tulips with red roses, or sunset colored roses (an exception to the "no orange" rule). Lavender tulips with lavendar roses. Pink roses with pink gerbera daisies. Lavendar freesia with lavendar roses. A few of each could be touching. Although still not as hot as roses.
It might not matter to some, but women tend to be expected to pay for disposible adornment. An arrangement of 3 roses doesn't cost more than one pair of pantyhose and might last longer. An arrangement of 6 roses doesn't cost more than hair highlights. A dozen roses do not cost more than a good bra (and even the good ones fall apart, especially if dried in the dryer even in a special container). So, from a female point of view, roses shouldn't be out of the question from men. After all, women are expected to finance a lot of disposible adornment like nail polish/manicures, hairdos, hairspray/mousse, facial primer, cosmetics, feminine hygeine products (every month for 30-40 years), barettes, nylons, and heels (the little heel tips wear down). in contrast, as far as I know, men's adornment is durable, like ties, hankies and flat-soled shoes... This is just for information, I'm not making determinations or drawing conclusions. So, in theory, the expense of roses could be justified.
When a woman has a beautiful rose, as it starts to wilt, she can hang it upside down in a brown bag to preserve it forever. A rose blossom cared for in a dark glass container can retain its shape and scent for twenty years or more. Even its color stays for a while. She can also use the petals for her bath after they dry, or put them in a sachet to fragrance a drawer. These sensory experiences just don't happen with most other flowers.