Discover ten weeds with purple flowers that can support ... it has delicate stems with purplish-blue, daisy-like flowers. ... is the clusters of drooping, bell-shaped purple, blue or pink flowers.

I also grow tall varieties ‘Bavaria’ and ‘Blue Horizon’, which are 18-20 inches tall and produce good cut flowers that dry well. Some species of ageratum can be pink and white as well as blue.

Blue mistflower is an extremely tough plant, and you can even mow it if you want. If left alone, it will grow up to 3 feet tall and naturally form clumps thanks to its underground stems, called ...

The plant sends up a flower stalk with lovely lavender-blue, bell-like flowers that bloom any time from June through September. But do not be deceived. This weed is evil, pure evil.

This pretty plant with nodding, bell-shaped flowers is insidiously taking over Calgary gardens, warns horticulturist John Duncan, who shares some tips on how to fight its spread.

We vacationed for a month and returned to find a 5-foot tall weed. I keep waiting for it to flower to help identify it, but the flower buds just sit there unopened. This is American burnweed, and ...