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What you need:
  • Pruning shears
  • Shredded bark
  • Dormant spray
Most roses can endure mild winters(zone 6 and up) without difficulty, but they may be injured or killed by abrupt temperature changes. Grafted modern Roses, Hybrid Teas, Floribundas, and Grandifloras in particular, are more likely to survive these changes with some winter protection. Begin by trimming the canes of large bushes back by about one-third in early December. The stems should be about waist high when you're finished. Remove all remaining leaves from the stems and clean up fallen leaves around the base of the plant.
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Place the leaves and cut stems in a tub or thick plastic bag and set it out with the garbage. Insect eggs and disease organisms can overwinter in foliage and clippings.
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Mound 6-12" of shredded bark, shredded leaves, leaf mold, or compost over the base of the rose to insulate the bud union or graft (which appears as a bulge in the main stem) from temperature fluctuations.