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Questions About Hydrangea Plants

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  • Answered by
    GKH_Susan on
    May 4, 2021
    Certified Expert
    A.

    It may be too much sun for Japanese maples, and some hydrangeas too. Some of the newer cultivars of hydrangeas take full sun, so you would need to be vigilant and read the tags. Here are some ideas:

    https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-6/plants-for-zone-6.htm

    https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-6/zone-6-flowers.htm
    https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-6/bushes-for-zone-6-gardens.htm
    https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-6/zone-6-native-plants.htm

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  • Answered by
    BushDoctor on
    May 3, 2021
    Certified Expert
    A.

    This can be a complex set of issues that you may have to pick off, one by one. Fortunately, we have an article that will help you to figure out, exactly, what is going on:

    https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/drooping-hydrangea-plants.htm

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  • Answered by
    GKH_Susan on
    May 5, 2021
    Certified Expert
    A.

    Most commonly it's improper pruning. If you aren't sure when to prune, it's best not to prune at all. Yours, however, is a paniculata type and here are instructions to prune it, if needed.

    https://www.johnson.k-state.edu/lawn-garden/agent-articles/trees-shrubs/pruning-hydranea.html

    https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm

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  • Answered by
    luis_pr on
    June 24, 2021
    A.

    Sorry, I typo'ed. I wrote May 14th and meant to say May 4th.

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  • Answered by
    luis_pr on
    June 24, 2021
    A.

    Although pruning in mid-to-late Spring would not be recommended (by me) because that is when they develop flower buds, I suspect that it is too early for paniculatas to be producing blooms in May 14th... at least in most areas (there may be a few broccoli heads in May here in Texas some years).

    Paniculatas that are small may take 2-3 years to blooms once transplanted.

    They are the most sun tolerant of hydrangeas so try to give them as much sun as you can (6+ hours), except in the south where leaves may fry if they get late afternoon summer sun and whose blooms may prematurely dry out due to heat stress in the southwest.

    Finally, be on the look out for Bambi. Deer love to graze and eat the ends of hydrangea stems, where paniculata flower buds reside.

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  • Answered by
    GKH_Susan on
    May 5, 2021
    Certified Expert
    A.

    Your soil needs acid and aluminum. Here's an article on how to acidify your soil:
    https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/raise-acid-level-soil.htm
    and how to add aluminum:
    https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/aluminum-in-garden-soil.htm

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  • Answered by
    luis_pr on
    June 24, 2021
    A.

    Purple colored mophead hydrangeas are usually a reflection of having the proper DNA and soil that is close to neutral...neither too acidic nor too alkaline. And it is generally cultivars that would produce a vivid blue in acidic soils with adequate aluminum that take on the deeper purple hues.

    And some cultivars are more stable in their coloring that others....typically those that tend to be pinks: Pia/Pink Elf, Glowing Embers, Teller Red, etc. Unless planted in very acidic soils, these tend to stay on the pink end of the scale. Varieties that resist turning blue in acidic soils -say, Merritts Supreme, Mathilda Gutges, Glowing Embers- will turn purple first before turning pink. But purple is always a tough one because it occurs in a very narrow pH range. Some varieties like Bloomstruck are bred to produce multiple colors within the same plant and purples tend to occur. Plant wholesalers also tweak the soil diet to enhance the purples.

    In my alkaline soil, I add some aluminum sulfate to an unnamed hydrangea lacecap (possibly Twist & Shout) such that it is slightly acidic and takes a purple-lavender tone. I was originally aiming for blues but liked this color better. ;o))

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  • Answered by
    GKH_Susan on
    May 10, 2021
    Certified Expert
    A.

    Here's an article with the info you need:
    https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/drooping-hydrangea-plants.htm

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  • Answered by
    GKH_Susan on
    May 14, 2021
    Certified Expert
    A.

    Try deadheading so they won't go to seed. If they are spreading by rhizomes underground, they need to be dug out each year.

    https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/deadheading-a-hydrangea.htm

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