galinsoga

Galinsoga (Galinsoga quadriradiata). Photo: Betty Marose

Updated: May 20, 2021

Life cycle

Summer annual

Growth habit

Grows from 1 - 2 ft. tall with erect branching stems; leaves opposite, egg-shaped with a pointed tip, toothed margins, covered with coarse hairs

Reproduction

Seeds produced by numerous small flowers in terminal clusters with 4-5 white rays surrounding yellow disc centers; germinate early spring through late summer; no dormancy period so seeds germinate throughout season; a single plant can produce 7,500 seeds that remain viable for a few years

Conditions that favor growth

Usually found in fertile soils in landscapes, gardens, and ornamental beds

Cultural control

Easy to remove manually; remove before plant flowers and produces seeds