Do your roses still flower? Are the blooms the same color as they originally were? It sounds like your rose plant may have a sucker or wild sprout and this means the rose has reverted back to the original wild rose. The flowers if they appear will be small and a muddy red color. If the rose has reverted back you should just dig it up and start with a new rose plant. The other possibility is that your rose need fertilizing. Roses are heavy feeders and need plant food every year. I use Osmocote in the soil at the beginning of the season and I also add a compost mulch and water the roses with Miracle Grow once or twice a summer right after they finish blooming. This keeps them well fed with continuous blooms. Keep growing, Marianne Binetti