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Questions About Roses

  • Answered by
    VanEllie on
    July 25, 2015
    A.

    Perhaps you could try a fungicide ( Physan 20) . Alternatively, it may be a good idea to remove the diseased plants before your entire collection is infected.

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  • Answered by
    roseman on
    July 26, 2015
    A.

    Usually the rose seeds one gets from Japan and China, etc... Are fakes and come from folks trying to steal our money. Many are weed seeds, some other plant seeds or even wood pellets. If they are true rose seeds, please see this article: https://www.gardeningknowhow.com/ornamental/flowers/roses/growing-roses-from-seed.htm

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  • Answered by
    Downtoearthdigs on
    July 27, 2015
    A.

    Most garden centers should carry these items.
    You can try a search on the internet and you can find a source online that could ship to you directly.

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  • Answered by
    Downtoearthdigs on
    July 27, 2015
    A.

    A series of spray applications of a fungicide called Mancozeb will usually stop black spot in its tracks. This article should help as well: https://www.gardeningknowhow.com/ornamental/flowers/roses/black-spot-roses.htm

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  • Answered by
    roseman on
    August 1, 2015
    A.

    I would suggest that you contact Weeks Roses to see what they recommend. Many of the on-line nurseries only ship in early spring. Perhaps check with Heirloom roses and see if they will do this.

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  • Answered by
    Janani on
    August 3, 2015
    A.

    Thank you for the prompt response. I will try it out.

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  • Answered by
    roseman on
    August 1, 2015
    A.

    It is hard to say what is going on with your rosebush. It could be that some herbicide spray drifted over onto it. It could also be that the pot is a bit too small for the bush and thus the root zone is not happy. The worst thing would be if Rose Rosette Virus is starting to show its face. I would say try pruning it back, water well with some water that has both a product calle Super Thrive in it and 1/3 cup Epsom salts per gallon of water. This mix should be used the next couple of times the bush needs water. Also be very sure the pot is draining properly and water is not allowed to stand in the drain pan area.

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  • Answered by
    roseman on
    August 1, 2015
    A.

    The best spray I have found to stop Black Spot in its tracks is called Mancozeb fungicide. It will leave a yellowish powdery residue upon the foliage but that is part of how it works. Spray the rosebushes affected with the black spot with this fungicide three to four times 7 to 10 days apart. The Mancozeb is avaialable from http://www.rosemania.com. After that you can use fungicides such as Honor Guard or Green Cure to keep it at bay. Once the fungus has been killed all new foliage coming out should be clear of the black spotting, if not, do the same spraying again. Once the black spot is on the foliage it will never go away. However you do not need to remove those leaves unless so desired.As the affected leaves will still function for the health of the rosebush until new ones take over.

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