WEED ID · PERENNIAL GRASS
Johnsongrass
Also called Johnson grass
A tall, coarse grass that comes back from underground rhizomes. It does not belong in a mowed lawn, and it spreads by seed too.
How to spot it
- Coarse, upright grass that can reach 3 to 6 feet tall
- Broad leaves with a white stripe down the middle of the upper side
- Large, open seedhead with yellow to purplish seeds
- Thick underground stems (rhizomes)
- Stands well above the lawn if not mowed
Why it shows up
Johnsongrass spreads by rhizomes and by seed. The seed forms in fall. It does well in disturbed soil and along ditches and creek bottoms. It does not like close, frequent mowing.
How we treat it
Johnsongrass is a tough perennial, so one visit is rarely enough. We will look at it on a visit and tell you what is realistic, which may mean spot treating with a product labeled for your grass type and coming back as new growth shows up. We also fertilize to keep your turf thick.
What you can do
- Mow regularly. Johnsongrass does not do well with close, frequent mowing.
- Do not let it make seed. Cut seedheads before they ripen.
- Watch ditches and bare ground at the edge of your yard.
WANT IT HANDLED?
Let a licensed applicator take it from here.
Tell us about your lawn. We’ll get back to you with a free quote.
Prefer to talk? 817-382-1722Licensed applicator, Texas Department of Agriculture · License #0984138