By seeds and rhizomes, but primarily by underground tubers known as nutlets.
Broadleaf annual (responsible for hay fever) with shallow, fibrous roots.
Control: To prevent this weed, mulch garden beds in spring. Pull plants by hand or apply a postemergence herbicide once it grows.
Size: 6 feet tall, 2 feet wide
Where it grows: Sunny landscape or garden areas
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Where It Grows: Sunny or shady landscape or garden areas
Test Garden Tip: This plant is sometimes grown as an ornamental in shade gardens.
Size: Climbs 6 feet or more
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Where It Grows: Shady lawn, landscape, or garden areas
Appearance: Wild violet is a groundcover with heart-shape leaves and purple flowers in late spring.