When adding roses to the garden, landscapers and homeowners typically plant rose bushes they've purchased at the nursery or through suppliers. Starting roses by seeds isn't an option most novice gardeners would consider. But for those who are adventurous or interested in experimenting in hybridizing roses, planting roses by seed is a rewarding challenge. The process can be time consuming and is not the option for the gardener who wants roses in full bloom by the next spring.