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  • Answered by
    drtreelove on
    November 7, 2018
    A.

    There appears to be a scale insect pest (white spots on the stems). The scale is a sucking insect that excretes a sweet honeydew on which a 'sooty mold' grows. The sooty mold is not harmful except to shade the leaves from sunlight, but the insect pest at this level is a serious condition.
    I believe the plants are susceptible to the pest infestation due to nutrient deficiencies, indicated by leaf discoloration which is characteristic of poor soil fertility.
    I recommend that you fertilize with a slow release complete organic fertilizer like the Dr Earth Acid Lovers on this page:
    http://www.fertileearthlandcare.com/fertilizers/

    Professional applicators would soil drench with a systemic insectide with dinotefuran
    https://www.domyown.com/alpine-wsg-p-2876.html?sub_id=14696

    I'm not sure about the other plants. The white material could be lichens or a fungal secondary growth on the dead stems, and not the cause of the mortality.

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  • Answered by
    MichiganDot on
    November 9, 2018
    A.

    The ideal time to prune azalea is right after it blooms; otherwise, you risk trimming off next year's blooms. More information is below. https://www.gardeningknowhow.com/ornamental/shrubs/azalea/pruning-azaleas.htm
    Detailed information on different types of pruning is here: https://www.rhododendron.org/v47n3p136.htm

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  • Answered by
    BushDoctor on
    December 5, 2018
    Certified Expert
    A.

    I do remember this. Have you made sure to remember to drill holes in the container? without having proper drainage it will throw off the soil environment.

    Other than this, and depending on the type of compost, and what animal manures are in it, there could still be too much nitrogen and not enough phosphorus and potassium.

    Another thing that is common with this issue is an extreme change in environment. I wouldn't recommend full sun since it will be moved into an area in which the windows filter out some of the spectrum of light. Even if it receives direct sun through the window, a test on light intensity and spectrum will reveal quite a loss.

    This drastic change will prevent flowering as well.

    Have you checked the soil pH? These will not like to go above 6.0 in pH. This will certainly cause an issue.

    Try correcting these last few issues and it will continue to flower.

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  • Answered by
    BushDoctor on
    December 5, 2018
    Certified Expert
    A.

    They are Azalea, or Rhododendron. These have recently been reclassified together into one group, so you can now take your pick on what to call them! There is a little trick to knowing exactly which is which, but it requires looking at how many stamen there are per flower. Either 1, or 2. That's it.

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  • Answered by
    Downtoearthdigs on
    December 5, 2018
    A.

    Is this plant in the same area as the rest? if it is not, then I would say that the pH of your soil is thrown off, and can be corrected with a little dolomitic lime. If it is in the same area then I might suggest that it could be a cultivar specific infection, which will require wettable sulfur, and dolomitic lime to correct. These azaleas are quite different than other cultivars, and may require different care.

    Alternatively, it may, simply, require some fertilization.

    Here is an article that will help you: https://www.gardeningknowhow.com/ornamental/shrubs/azalea/common-azalea-problems.htm

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  • Answered by
    Downtoearthdigs on
    February 8, 2019
    A.

    Fertilizing is often not required if you mulch regularly, but you may do so in early spring if you are noticing deficiencies. Pruning them can be done anytime between the time that the old blossoms fall off and the new start to grow.

    This article will give you more information: https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azaleas-noteworthy-shrubs-for-any-garden.htm

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