BES-TEX Weed ID Guide · Broadleaf Weeds
Ambrosia artemisiifolia
Common Name
Annual Ragweed
Latin Name
Ambrosia artemisiifolia
Family
Asteraceae
Life Cycle / Type
Summer annual · Broadleaf
Annual ragweed is a summer annual broadleaf weed with deeply divided, fern-like leaves and an upright growth habit. It is a heavy pollen producer and commonly found in thin turf, disturbed soil, and unmanaged areas.
Annual ragweed germinates as soils warm in spring.
Above 55°F
Germination begins
Above 75°F
Peak emergence and rapid growth
Decision Question
Missed spring pre-emergent timing
Bare or disturbed soil
Thin or stressed turf
A healthy, thick lawn is the best defense against weeds.