Welcome to ATP !
Unfortunately, no you can't.
Fragrance in a rose is a genetic trait. Not all roses have a fragrance. Some are mild, some are medium and some are strong.
Sometimes the climate can bring out the scent of a rose which normally doesn't have much of one, but it will usually be faint.
byuby71268,
Welcome,
Your red roses may not have any scent to them, but there are plenty of red roses that do. So if you have room you can add more, or if you really want scent in the roses, you can replace the ones you have.
