Our board member and past owner of a garden centre, Brian Duncan, recommends the following.
For a continuous blooming Never Alone Rose place the rose in a pot or planting pit that is a minimum of 24×24 inches or 65×65 cms. Full to half sun. Well drained is very important. Use a pre-mix potting soil. They come under a number of trade names. Mix a slow release fertilizer into the soil as per fertilizer instructions and top dress with the same slow release fertilizer at the beginning of July. The fertilizer comes under a number of trade names as well, slow release is key and 90 day slow release is preferred.
As the plant blooms remove spent rose (s). The rose blooms in clusters, just remove the spent rose (not the cluster). When the whole cluster is spent remove this cluster stem back to the node or stem where it began to grow.
For the winter – Make sure it is in a well drained area that gets plenty of snow cover. You can cut the bush back by 1/3 and cover it well with leaf mulch. You may want to protect against mice, deer and rabbits. If you planted in a pot protect the roots by insulating the pot well. You can dig it in the garden or put it in a well insulated box with plenty of snow cover. Make sure there is good drainage. Remember potted patio pots do not over winter as well as those planted in the garden. This plant does perform well in patio planters and the number of flowers during the growing season is phenomenal, well worth any risk of over wintering.