I live in Northern Virginia and am concerned about possible heavy snow damaging two knockout rosebushes this winter. Is it okay to trim them slightly now with a bigger trim at the beginning of spring? I don't want to stimulate new growth now if that's the wrong thing to do.
It is okay to cut out damaged wood in winter. If you do, be sure to coat any cut with a diameter of 1/2 " or more with a protective paint to keep in water and to keep out disease. They will save their new growth for spring.