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flowers that grow like weeds

Flowers that grow like weeds

Annuals that reseed themselves can make gardening easier, but some soon try to bully the rest of the plants.

One of the worst offenders is cosmos, he says. When they are planted from seed or transplanted the first year, they are pretty and almost nice to have around. But, every year after that the flowers become less attractive, and the plants become taller and uglier.

Red valerian is a seedy plant that is not as easy to remove, Goodspeed says. If the many new plants that pop up are allowed a few minutes to set root, they can be really hard to pull out. This plant also has a tendency to try to grow in the middle of other perennials, shrubs and sidewalks. The advantages of this flower include its attractive red to pink blossoms, and the fact that it blooms for most of the summer.

Size: To 10 feet tall and 2 feet wide

Test Garden Tip: This plant is sometimes grown as an ornamental in shade gardens.

Control: Mulch your garden to prevent it in landscape areas. Use a postemergence herbicide in lawns in spring or fall, or dig the weed out by hand.

Type: Broadleaf annual

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Test Garden Tip: This weed is native to areas of North America. Unlike many exotic weeds, it does support local wildlife.

Where It Grows: Fertile, sunny landscape and garden areas

Appearance: Identify this weed groundcover by its fleshy, dark green leaves and small yellow flowers at the ends of the stems.

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Type: Broadleaf perennial

Type: Broadleaf annual