Arlene,
I grow both Westerland and Zephirine, and neither gets any spray or fertilizer! They are fabulous roses, but be warned, they get huge. I get scattered rebloom on Zephirine, but Westerland blooms constantly from spring till fall. Zephirine is usually known as a once-bloomer, and mine is on the east side of the house, so I don't know why it does so well for me. I planted it right by the front door because it is thornless and the scent is incredible. After the blooms finish the main flush, a clematis growing through it continues the show.
My Westerland faces south and is in front of a covered porch on our barn along with Jacob's Robe and Autumn Sunset, which is a sport of Westerland. All of them get huge, even though I never feed them. I think it is because they are near the well spigot, right under the porch dripline, and there is no root competition since they are planted in a gravel parking area. I will look for a photo. Westerland and Autumn Sunset grow to the roofline every summer. All 3 are pretty thorny.
