rose bush problem???

Discussion in 'Roses' started by phalnoob, Jul 1, 2015.

  1. phalnoob

    phalnoob Apprentice Gardener

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    Hello all.
    Last summer i planted rose bushes x3. Did great and grew brilliantly and the flowers were huge,then trimmed them back at winter. This year they have shot up and are huge!!about 10 flowers now open and loads of buds. But the very top have went whitish in colour (branches and buds, but opening slowly and are fine looking) could it be the sun (when weve had it) or is it something else, as i say its only the top, i ramaged around and checked underneath.
    Thank you in advance!
     
  2. wiseowl

    wiseowl Amicable and friendly Admin Staff Member

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    Good evening @phalnoob I photo would be useful my friend if that is at all possible,It could be Powdery mildew which usually occurs in periods of cool nights, humid days and no rain.but on the facts that you have given me this is only a possibility and a not definite answer
    I hope this is of some help to you:smile:

    Seasonal weather:
    A summer that combines drought with high humidity is an invitation to powdery mildew.Crowded plants: Densely packed plants, overgrown shrubs, or plants under trees, are more susceptible to powdery mildew due to poor air circulation and cool, humid conditions.

    [​IMG]
     
  3. phalnoob

    phalnoob Apprentice Gardener

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    Oh thank you so much. It looks like the pic there. I think based on what u said it could be our up and down weather and also the area they are in seems to have really grown, i got a cheap plant food and wow my little bedding plants are massive!!!!! Maybe i need to trim some things back and make more room???
    Is there anything i could do to get rid of it or is it not harmful.

    Thanks again @wiseowl
     
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    • wiseowl

      wiseowl Amicable and friendly Admin Staff Member

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      Hi @phalnoob you are most welcome, this might help you my friend;)


      One of the easiest ways to control powdery mildew is to give your roses a thorough wash at least two mornings a week. A morning bath raises the humidity so powdery mildew spores can't mature. Free water left on the plants also discourages spore maturation. Plants must be dry before nightfall so residual moisture does not provide favourable conditions for spore germination.

      Powdery mildew is attracted to lush, new growth. If you have a serious problem year after year, you might want to reduce the quantity of fertilizer applied in January and/or postpone fertilizing until your plants start growing vigorously in the spring.


      Solution #2 - The Baking Soda-Vinegar Formula

      1½ tablespoonsbaking soda
      2 tablespoonsvegetable oil
      1½ tablespoonsSafer Insecticidal Soap (or liquid, not dish, soap)
      1 gallonwater
      1 tablespoonvinegar
      Mix together the baking soda, oil, soap, and water. STIR in the vinegar last - don't shake! Pour into a no-clog type hose-end sprayer. If you only have a couple of roses to treat use a hand-held spray bottle. Spray in the morning and when the temperature is less than 80 degrees. Thoroughly soak all parts of the plant. Apply weekly as needed.

      If you remember your high school chemistry, when you mix an acid (vinegar) and a base (baking soda) they cancel each other out and you get water that has a neutral pH. So the question is, how does this formula work to kill mildew?

      When baking soda and vinegar are mixed they produce water, carbon dioxide (which bubbles away), and sodium acetate (which stays in solution). I found many references to sodium diacetate as a mold and mildew inhibitor in baked goods and some references to sodium acetate as a fungicide. Apparently, the active ingredient of the baking soda-vinegar solution is the sodium acetate.

      Solution #3 - The Vinegar Rinse

      2 tablespoonswhite or cider vinegar (5 percent)
      1 gallonwater
      Pour undiluted vinegar into the container of a dial-a-spray hose-end sprayer. Set the dial to deliver 2 tablespoons per gallon and start spraying. Soak the entire plant, making sure to get the undersides of the leaves. Spray only in the morning. Apply once a week as needed until theweather warms up.
       
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      • phalnoob

        phalnoob Apprentice Gardener

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        Thanks you so much for taking the time to help me!
        Greatly appreciated!!!!
         
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        • wiseowl

          wiseowl Amicable and friendly Admin Staff Member

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          Good evening @phalnoob my friend no worries any time you need advice or help in any area of Gardening just ask:smile:
           
        • phalnoob

          phalnoob Apprentice Gardener

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          @wiseowl thanks again for the tips, i spent the weekend trying to sort the area out and found under the rosebushes there was alot of weeds tangled round the base of the roses so i managed to clear them all out and they already seem to be stronger standing and happier.
           
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          • wiseowl

            wiseowl Amicable and friendly Admin Staff Member

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            Good afternoon @phalnoob my friend well done ,your roses will repay you for years to come:smile:
             
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