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broadleafannualDifficulty
Prostrate knotweed
Polygonum aviculare
A wiry, blue-green mat with small oval leaves that grows where the ground is beaten hard: along driveways, paths, and the kids' goal mouth.
How to tell
- •Wiry stems with a papery sheath at each node
- •Small blue-green oval leaves
- •Flat mat that survives being walked on
- •Germinates very early, March
Why it is in your lawn
Severe compaction. It is the most compaction-tolerant lawn weed there is.
Best window
Early March prevention; aerate in fall.
1 · Fix the cause
- Core aerate twice a year in the affected strip
- Topdress with compost
- Redirect foot traffic or install a path
2 · Eco product
Corn gluten in early March, earlier than for crabgrass, since knotweed germinates first.
Track the price of Corn gluten meal pre-emergentWhat you are signing up for
If people walk there, consider making it a path.
Reference only · what the truck would spray
Active ingredient
Dicamba mixes
Typical product
Weed B Gon
Why we do not recommend it
Comes right back unless the compaction is fixed.
We never link to or price-track conventional herbicides. This panel exists so you understand what a service is selling you.