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Top Questions About Knockout Rose Bushes

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Questions About Knockout Rose Bushes

  • Answered by
    MichiganDot on
    April 2, 2018
    A.

    A rule of thumb is to prune roses when forsythia starts to bloom. Usually this coincides with rose leaf buds swelling and starting to open. Cut back to an outward facing bud. Cut back until you reach live wood: look for a rim of bright green just under the bark. Healthy canes are solid green. Barberry can be pruned late fall through early spring. If the shrub is getting crowded, cut a few of the largest stems to the ground and prune out very thin stems.

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  • Answered by
    MichiganDot on
    April 4, 2018
    A.

    I forgot to add this link about rose rosette disease:
    http://www.rose.org/rose-care-articles/rose-rosette-disease-sadly/

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  • Answered by
    MichiganDot on
    April 4, 2018
    A.

    I don't think there is an answer to your question yet. The current advice is to not replace infected roses with new ones in the same location. Removing all roots from infected bushes is advised as there is now some evidence of root to root spread of the virus. Removing the soil is an option but how deep to go isn't clear. In addition, if the virus is in your neighborhood, planting roses now may be an invitation for the virus to return via the mite vector. For example, some areas decimated by the emerald ash borer are advising their citizens to avoid planting ash trees at this time.

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  • Answered by
    MichiganDot on
    April 10, 2018
    A.

    The old saying is to prune roses with forsythia blooms. With the weather still unsettled where I live, I'm waiting even though I see the same thing on my Knock-Outs. If I see a leaf unfurl, I will prune. Pruning will remove many of the old leaves but I remove what is left on the plant and on the soil. I also noticed I have significant die-back from early severe cold last December. Make sure you prune back to clean white pith that has a thin circle of green just under the bark.

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  • Answered by
    roseman on
    April 12, 2018
    A.

    You should be able to do a light shaping pruning. If they are growing very actively now, do a very light shaping pruning. It is easy to prune them too much and lose most of a bloom cycle. In your area you should be okay.

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  • Answered by
    MichiganDot on
    April 12, 2018
    A.

    It looks like black spot or winter die back. At any rate, prune out the large, blackened stem all the way to where shoots are coming out at the base of the rose. The inside of the cane should be white with a thin green line under the bark. Any cane that is not completely white in the center should be removed. Cut back to 1/4 inch above an outward-facing bud. The rose should recover nicely.

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  • Answered by
    MichiganDot on
    April 13, 2018
    A.

    Easy Elegance is the registered grower and this links takes you to their comments on Kashmir rose care. http://www.easyeleganceroses.com/design-and-grow/planting-and-care

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  • Answered by
    MichiganDot on
    April 25, 2018
    A.

    Pruning is best done right when the leaves are opening. If you missed that timeframe, it is OK to do it now. However, there is no need to cut Knock-Outs back by one third. Remove thick, gray canes to the ground. Remove dead wood, wood that is growing toward the center instead of outward and any canes that are less than pencil width. The goals are to increase vigor by removing old wood and to improve air circulation and sun penetration which lessens disease and improves bloom.

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