Yes—most own-root roses will bloom in their first year, especially if planted in spring. However, there are a few exceptions. Some Old Garden Roses, Ramblers, and Climbers bloom only on year-old wood, so they may not flower until their second season.
It’s also helpful to know that the first blooms on an own-root rose might not look exactly like the mature version of the plant. The color, size, petal count, and fragrance often take time to fully develop as the rose bush matures.
If you planted your rose in the fall and live in a colder climate, you may not see blooms until the following spring, once the plant has had time to settle in and the weather warms up.