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Top Questions About Dahlias

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Questions About Dahlias

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  • Answered by
    Nikki on
    September 25, 2011
    Certified Expert
    A.

    Unless you live in the south where winter temps are milder, then you should dig up your dahlia tubers. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/bulbs/bgen/storing-bulbs-in-south.htm

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  • Answered by
    Nikki on
    October 9, 2011
    Certified Expert
    A.

    Tender bulbs, such as dahlia, actually require lifting each fall and overwintering indoors in cold regions like yours. Only in warm, southern regions can these bulbs be left in the ground year round. They can be easily lifted with a garden fork or spade shovel prior to the complete die out of their foliage. Break up the clumps and separate the bulbs, allowing them to dry out some before storing, usually about a week or two in a cool, dry area. Then, clip off the foliage, shake off any remaining soil and pack the bulbs in dry peat moss or wood shavings within a brown paper bag or cardboard box. Place them in a dark area with cool room temperatures, like a basement, until spring.

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  • Answered by
    Nikki on
    October 15, 2011
    Certified Expert
    A.

    They could be a few things, but aphids or mites are the most likely. I personally like neem oil. It is very effective on pests but harmless to people, pets and beneficial bugs. Here is more information:
    https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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  • Answered by
    Nikki on
    November 13, 2011
    Certified Expert
  • Answered by
    Nikki on
    June 27, 2012
    Certified Expert
    A.

    Yellow leaves can happen for a number of reasons. When did you last fertilize? Too much nitrogen can eventually cause the plant to yellow and start to die. If you have not fertilized, then underwatering, lack of nutrients or a fungus may be to blame. Increase water a bit, use a balanced fertilizer on the plant and treat it with a fungicide. This should take care of the most common causes of yellowing.

    You may also find this article helpful:
    https://www.gardeningknowhow.com/plant-problems/environmental/plant-leaves-turn-yellow.htm

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  • Answered by
    Heather on
    August 13, 2012
    Certified Expert
    A.

    I would not at this time, but for next year, you may want to pinch the tops while the plant is still small. This will force the plant to grow fuller. At that height now, cutting back that much would hurt the plant. It is best to stake them up this year and pinch them next year.

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