That new growth is dangerous because it puts the plant at risk of freezing out.
Clean all debris from base of plants, including weeds, which harbor pests like aphids and spider mites, or diseases such as rust. Top rose beds with a quality, weed-free mulch or compost to a depth of 2 to 3 inches.
But in early fall, if warm weather arrives, it can signal the rose to put forth new growth.
Mound higher in cold climates. Tools for Fall Rose Cleanup. Bypass clippers; Tool sharpener; Heavy duty rose gloves; Bucket for supplies. Mar 08, Keep the Bushes Well-Watered.
The Spruce / Randi Rhoades. After the first frost, thoroughly water the soil around your rose bushes, ensuring you use enough water to penetrate several inches deep.
The reason: Once the ground freezes for good.