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Bush roses such as hybrid teas and floribundas are winter hardy in all but the coldest climates; in these areas it is advisable to bank the plants up with soil or heavy mulch straw for the winter. This should be done when the main autumn flush of bloom is over; the soil or straw mulch should be retained until only light frosts are expected.
Even though the tops of some canes may freeze back, sections below soil level will survive and be the source of new flowering stems next year.
Stems of bush roses taller than 3 ft. should be shortened somewhat in late autumn. This makes it easier to work between the plants and also lessens winter breakage from ice and snow, where they may occur. Other bush roses, including types such as rugosa hybrids, species such as Rosa hugonis and most hybrid perpetuals, can stand severe cold.