Type: Broadleaf perennial
Size: To 15 feet tall and wide
Where It Grows: Sunny or shady landscape or garden areas
Appearance: Poison ivy can be a vine, shrub, or groundcover. The weed has leaves divided into three leaflets and can sprout clusters of green berries.
Control: Prevent poison ivy with a deep layer of mulch. If the weed starts to grow in your yard, spot-treat it with an herbicide.
Test Garden Tip: The plant contains oils that cause a severe allergic skin reaction in many people when touched. These oils are present even on dead leaves and can become airborne and inhaled if the plant is burned.