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  • Answered by
    roseman on
    June 10, 2018
    A.

    Any pruning you do to the Knock Out Rose Tree as she grows will take away from her blooms production. You can lightly prune her to keep a shape you desire, just be aware that it will likely affect the blooms for one cycle.

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  • Answered by
    Downtoearthdigs on
    June 20, 2018
    A.

    We will check the article, thank you.

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  • Answered by
    MichiganDot on
    July 2, 2018
    A.

    I can't speak to your situation but most automatic sprinkles are set for 15 to 30 minutes which delivers only a small amount of water. Try setting out a tuna or a pet food can (straight sides) and measure the water. Roses need a minimum of one inch per week, two in hot, windy or very dry weather. On the other hand, not getting at minimum of 6 hours direct sunlight daily is a problem. The rose will lose vigor and be more susceptible to disease and insect invasion. There seems to be a lot of rose slug damage this year. Look into that as the culprit in the leaf issues. And, of course, it is Japanese beetle time so get out the soapy water bucket and sweep the beetles into it twice daily. They are voracious rose leaf/bud eaters. More on rose slugs follows. You can expect another generation of them to appear in mid to late July. https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-slugs.htm

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  • Answered by
    MichiganDot on
    August 20, 2018
    A.

    Oh, a picture is worth a thousand words! I'll start by assuming this is not blackspot fungal disease. If you aren't familiar with blackspot, read up on it as it is a common cause for black spots followed by yellowing leaves. Make sure the top 1-2 inches of soil are dry before watering and then water enough so a bit of water comes out the drainage holes. You want the soil moist, not wet. The other issue that comes to mind is nutrient deficiency, particularly low nitrogen. Roses are heavy feeders and need a regular schedule of fertilization. Follow instructions on the fertilizer container. If you routinely water so lots of it runs out the drainage holes, you are washing out soil nitrogen. Phosphorus and potash move through soil much, much slower than nitrogen. Lastly, did you use good potting soil? If you planted using yard soil or bagged topsoil, that's a problem and you should repot using bagged "potting soil". These are specially formulated for growing in containers. I'm including a link to an article that discusses many rose diseases. https://extension.illinois.edu/roses/disease.cfm

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  • Answered by
    MichiganDot on
    September 4, 2018
    A.

    Roses don't bloom if they are stressed or if they don't get enough sunlight. While you will get some blooms with 5 hrs of direct sunlight, roses prefer 6-8. Are you using a low nitrogen fertilizer? Look for something that has an NPK ratio of 1-3-1 or similar. (e.g. 4-12-6) Too much nitrogen favors leaves over blooms. Roses require an inch of water weekly, 2 inches in hot weather or sandy soil. As temps cool down, roses often pick up their blooming. Look for flower buds. Are they being devoured by insects? Some rose pests are tiny and hard to see but they can cause real damage. Smaller insects seem to favor flower buds and new leaves. Damage may cause the buds to fall off or fail to open. Are there vigorously growing canes that get taller than the rest of the plant; are these coming from the ground instead of the main stem? If yes, kept these cut off at ground level. They are called "blind shoots" and are using up a lot of your plant's energy. One last thought: has the rose sunk since you planted it? It is very important that the base of the rose be above ground.
    I've linked to articles that may be helpful:
    https://ask.extension.org/questions/135664
    https://www.gardeningknowhow.com/.../knockout-roses/care-knockout-roses. htm

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  • Answered by
    MichiganDot on
    September 18, 2018
    A.

    Roses are pruned annually in early spring before they leaf out. They benefit from hard pruning and reward the gardener with vigorous new growth. New growth blooms best in Knock-Outs. However, if you miss a year, don't fret. They will still bloom but may get taller than desired. Remove all growth that isn't at least pencil width. Cut back old gray canes to the base - all the way down. Remove all stems growing toward the center. Leave 5 major canes about 2 ft high that are growing away from the center. It may sound drastic but it works. The goal is an open center that sunlight can penetrate and air can circulate. Other vital parts of routine rose care are full sun, fertilizer and weekly water. Regardless of the time of year, always remove dead, damaged, diseased and dying canes right away as they invite disease. This includes 2 canes that are rubbing against each other. Rubbing forms a wound where germs can enter. Remove one of the two canes. https://www.gardeningknowhow.com/.../knockout-roses/prune-knockout- roses.htm

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