Answer: You don't have to trim your roses at the end of the season but in the spring, just as the buds begin to swell, prune your shrub roses down to about 2'. Then remove the oldest canes, leaving 3-5 of the most vigorous canes. Prune these to an outside facing bud (in the direction you want the plant to grow). Then, to encourage additional blooms, cut the spent flowers off down to a 5-leaflet leaf. This is where new roses will appear. Roses will grow in average soil, as long as it drains well. If you're planting in a container, use half-potting soil and half-garden soil.
Best wishes with your roses!
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