Common Weed With Blue Flowers

Written by brenda ingram-christian
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  • Introduction

    Common Weed With Blue Flowers

    Many beautiful wildflowers can be added to your flowerbeds or as a natural border to your property. Many flowers were considered weeds at one time but are now prized for their blue colour and their ability to attract pollinators and butterflies to a garden. A few blue-flowering weeds should be removed or destroyed with a weed killer to stop their spread.

    Many blue-flowering perennials and annuals were developed from weeds. (Jupiterimages/ Images)

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    Corn Speedwell

    Corn speedwell or Veronica arvensis is a lush broadleaved annual weed that produces small blue flowers. Flowerbeds that have not been heavily mulched or areas of poor soil where there is little competition may invite the spread of this weed.

    Corn speedwell produces small blue flowers. (speedwell image by Christopher Hall from

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    Wild Violets

    Wild violets are a perennial weed with a strong root system that is difficult to remove. This common blue-blooming weed grows well in shady areas where grass may have more difficulty becoming established. They are also found in purple, grey and white.

    Wild violets can be invasive and difficult to manage. (blue - violet flowers (forget-me-not) image by Vladimir Melnik from

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    Blueweed or Echium vulgare L. is a common plant found in pastures and natural habitats. The pyrrolizidine alkaloid found in this plant can be toxic to horses and cattle, according to Montana State University.

    Blueweed should be removed from pastures. (Cows in pasture image by Matt Pinkney from

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    Wild Hyssop

    Blue vervain, also known as wild hyssop or ironweed, is more common east of the Mississippi. According to Ohio State Extension, blue vervain was used to dress the wounds of Jesus Christ.

    Wild hyssop grows east of the Mississippi. (upper Mississippi river - sauk rapids image by Brenton W Cooper from

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