Science · Turfgrasses
Annual Bluegrass (Poa annua)
Poa annua is a cool-season, prolific seeder that can persist under low mowing; annual and perennial forms occur.
Profile
- Identity
- Poa annua; annual and perennial forms
Source: Annual Bluegrass — UC IPM ↗ — Poa annua is a cool-season prolific seeder; survives low mowing and reseeds. Includes annual and perennial forms; weed-control context, not a putting-green specification.
Omitted numeric mowing, pH, hardiness-zone and temperature claims are not verified here; use locally applicable species/cultivar and use-specific guidance. Sources do not validate product telemetry or diagnostic claims.
Water & soil context
- Moisture (VWC)
- No universal species target; calibrate to the installed soil/profile, sensor depth, field capacity and observed dry-down.
- Salinity tolerance
- Assess irrigation-water and root-zone salinity; tolerance depends on species and site.
- Drought tolerance
- Heat and drought sensitivity vary by population and site; no universal time-to-death claim.
Use root-zone measurements with field inspection; do not infer irrigation needs from a fixed VWC band.
Source: Soil moisture sensors for irrigation scheduling — UMN Extension ↗ — VWC is distinct from soil tension; soil/site calibration and root-zone measurements matter. Agricultural principles, not species-specific target bands.
Problems to watch
- Prolific seedheads
- Summer decline requiring site investigation
Stress signs
- Discoloration or thinning is not diagnostic; inspect the site
Source: Lawn Insects — UC IPM ↗ — Brown patches have multiple causes; confirm damaging insect populations before treatment. Not a species-specific pest ranking.
Where you'll find it
- Golf greens (especially coastal)
Sources & scope
- Annual Bluegrass — UC IPM ↗
Poa annua is a cool-season prolific seeder; survives low mowing and reseeds. Includes annual and perennial forms; weed-control context, not a putting-green specification.
- Soil moisture sensors for irrigation scheduling — UMN Extension ↗
VWC is distinct from soil tension; soil/site calibration and root-zone measurements matter. Agricultural principles, not species-specific target bands.
- Lawn Insects — UC IPM ↗
Brown patches have multiple causes; confirm damaging insect populations before treatment. Not a species-specific pest ranking.
More turfgrasses
All Science profilesPublished botanical and soil references are distinct from GroundWorx product guidance. Moisture thresholds and monitoring depths require site calibration; sources do not establish product performance or diagnose stress.