What Annual Bluegrass (Poa annua) looks like
Bright yellow-green, fine-textured grass finer than most turf, with distinctive seed heads that appear papery and light-colored.
Photo: Wikimedia Commons
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Best approach: Herbicide spray
Hand-pulling is impractical — Poa annua produces thousands of seeds per plant. Pre-emergent herbicide in fall is the most effective approach.
Best products for Annual Bluegrass (Poa annua)
Formulated to kill annual bluegrass (poa annua) without wiping out your grass — see the timing and chemistry below.
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Dimension 2EW (Dithiopyr)
✓ Kills annual bluegrass (poa annua)Liquid concentrate; 64 oz half gallon; mix with water and spray
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Herbicide is dosed by lawn size. Pick your yard size for a quick estimate:
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When to treat Annual Bluegrass (Poa annua)
Annual bluegrass germinates in autumn, so apply pre-emergent in late summer as soil cools toward 70°F — spring is too late.
Chemical treatment
Apply a pre-emergent (dithiopyr) in fall to prevent germination, or use glyphosate for spot treatment in spring before it sets seed. Post-emergent options are limited.
Non-chemical management
Maintain healthy perennial turf through proper fall seeding; reduce shade and improve drainage.
How to stop Annual Bluegrass (Poa annua) coming back
Maintain healthy perennial turf through proper seeding in fall; reduce shade and improve drainage.
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Measure my lawn — it's free →FAQ
What does Annual Bluegrass (Poa annua) look like?
Bright yellow-green, fine-textured grass finer than most turf, with distinctive seed heads that appear papery and light-colored.
What's the best way to kill Annual Bluegrass (Poa annua)?
Herbicide spray. Hand-pulling is impractical — Poa annua produces thousands of seeds per plant. Pre-emergent herbicide in fall is the most effective approach.
Is Annual Bluegrass (Poa annua) hard to get rid of?
Annual Bluegrass (Poa annua) is rated moderate to control. Consistent treatment over a season usually does the job.
How do I stop Annual Bluegrass (Poa annua) coming back?
Maintain healthy perennial turf through proper seeding in fall; reduce shade and improve drainage.
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