Chicory

(More lawn weeds)  (Control Options)  

Chicory
Cichorium intybus

Life cycle: perennial from a basal rosette; has a taproot
Growth habit: basal rosette similar to dandelion; leaves lanceolate, toothed, and rough on the upper and lower surface; erect, wiry branching stems grow up to 3 ft. high and carry bright blue, ray flowers 1 inch across; only a few flowers open at a time and flowers last only one day, opening early morning and closing as sun increases intensity
Reproduction: by seed; the average plant produces about 3000 seeds
Conditions that favor growth: open, well drained, unmanaged areas
Cultural control: will regrow after mowing but not after deep tillage