Weeds of Container Nurseries in the United States

Sowthistle and wild lettuce are closely related species in two genera with similar life cycles and control recommendations. The species can overlap the winter and summer annual categories. Plants form a rosette of waxy leaves with variable leaf margins. Certain species have prickly leaf margins. In warm weather plants bolt to about 3 to 4 feet tall, but may be shorter. Flowers are yellow. Seedhead is similar to dandelion. Seeds have a pappus that aids wind and water dispersal. Do not let plants go to seed in the nursery. Well controlled by preemergence broadleaf herbicides available for nursery use.

sowthistle

wild lettuce