Prickly lettuce is a winter annual. The leaves form in a basal rosette. Prickly lettuce has a deep taproot which will exude a milky sap. Prickly lettuce will produce an upright stem on which the leaves will be alternate. The mature leaves are deeply lobed. The leaves will twist vertical to the stem. The leaves have a row of spines along the mid-vein of the lower surface. The flowers of prickly lettuce are yellow in color and approximately 1/3” in diameter. Flowers are produced in late spring to early summer. Prickly lettuce reproduces by seed. Prickly lettuce is found throughout most of the United States and Canada except southern Florida, northern Maine and Newfoundland.
Weed Photos: Courtesy of Dr. Lambert McCarty. Clemson University. Clemson, SC.
For optimum control, apply your post-emergence herbicide to prickly lettuce that is actively growing and in the seedling to flower stage of growth.
PowerZone® Broadleaf Herbicide
Q4® Plus Turf Herbicide for Grassy & Broadleaf Weeds
SpeedZone® Broadleaf Herbicide for Turf
SpeedZone® Southern Broadleaf Herbicide for Turf
SpeedZone® Southern EW Broadleaf Herbicide for Turf
Super Trimec® Broadleaf Herbicide
Surge® Broadleaf Herbicide for Turf
Trimec® Bentgrass Formula Broadleaf Herbicide
Trimec® Classic Broadleaf Herbicide
Trimec® Encore® Broadleaf Herbicide
Trimec® Southern Broadleaf Herbicide for Sensitive Southern Grasses
TZone SE Broadleaf Herbicide for Tough Weeds