There is a week in late April — sometimes early May, depending on the year — when the forsythia has finished and the soil has warmed but the roses have not yet leafed out fully. That is your window.
I learned to prune roses from my mother on the farm in Fyn. She kept a dozen David Austins along the south wall of the dairy barn, and every spring she would walk the row with her Felcos and a bucket, cutting each cane to an outward-facing bud about a third of the way down. No more, no less. She never consulted a book.
On the Cape, the timing shifts a few weeks later than the textbooks say. Our springs are slow — the ocean holds the cold. I wait until I see the buds swelling but not yet breaking, then make my cuts. A sharp bypass pruner, a forty-five-degree angle, a quarter inch above the bud. Clean cuts heal faster. Ragged cuts invite disease.
The hardest part is removing what looks healthy. Crossed canes that rub together invite canker. Inward-facing growth crowds the center and blocks air. You have to see the shape the plant wants to become and clear the way for it. My mother used to say: prune for the rose you want next August, not the one you see today.
The temptation is always to prune too early, because you are eager, or too late, because you were busy. Both cost you blooms. The garden does not work on your schedule. You work on its.