Is it okay to plant parade roses outside now in Level 5 (Erie, Pa)?
Parade Rose Planting
It should be fine. Put a tablespoon of superphosphate in the planting hole and mix it in with the dirt in the bottom of the planting hole. That will give the root system something good to munch on even over the winter months. Also water it in with some root stimulator added to the water as that will help get the root system going and reduce any shock. Once the weather gets colder, mound some soil up around the base of the rose a bit too.