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Top Questions About Annual Periwinkle Flowers

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Questions About Annual Periwinkle Flowers

  • Answered by
    Heather on
    September 23, 2012
    Certified Expert
    A.

    Typically, this flower will reseed on its own. You can encourage reseeding by avoiding deadheading, planting the original plants in a sheltered location and laying down a bit of protection in the fall, such as straw or a bit of mulch.

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  • Answered by
    Alisma on
    October 11, 2016
    Certified Expert
    A.

    Yes, this plant is often kept as a houseplant and should do well indoors. Cut down on watering, since plants typically use less water indoors. Also be aware that this is a poisonous plant, so it should be kept away from children and pets.

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  • Answered by
    fenwright on
    October 11, 2016
    A.

    Thank you for your answer.

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  • Answered by
    Downtoearthdigs on
    April 17, 2017
    A.

    You can mulch to add in moisture retention.

    https://www.gardeningknowhow.com/ornamental/groundcover/periwinkle/growing-periwinkle.htm

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  • Answered by
    BushDoctor on
    October 14, 2017
    Certified Expert
    A.

    They aren't very picky. I wouldn't plant them too close together, as they will quickly spread and fill out an area. Maybe start a foot apart from each other. Be sure not to establish these where you will not want them in the future. They can be tricky to get rid of once you get them established. Here is an article that will help: https://www.gardeningknowhow.com/ornamental/groundcover/periwinkle/growing-periwinkle.htm

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  • Answered by
    GKH_Susan on
    March 8, 2020
    Certified Expert
    A.

    If the soil is too alkaline you can have a problem with uptake of iron. Yellowing also can be caused by lack of nitrogen. Try using a fertilizer with iron, nitrogen and sulfur to balance the pH and replace lost nutrients.

    https://www.gardeningknowhow.com/ornamental/flowers/annual-vinca/vinca-is-turning-yellow.htm

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  • Answered by
    GKH_Susan on
    March 21, 2021
    Certified Expert
    A.

    Turn these toward bright light as soon as possible. If you started them outdoors, some sunny weather should help them anchor and grow strong. If they're inside, get them under a light as soon as possible until you can get them transplanted. Here's an article for you:
    https://www.gardeningknowhow.com/ornamental/flowers/annual-vinca/growing-annual-vinca-seeds.htm

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