Johnson grass can be eliminated by mowing and tilling but it takes time perseverance and a ton of energy.
It grows from rhizomes and these rhizomes store energy.
They collect energy by way of sprouts what we see as the grass.
If the grass is continually cut and the rhizomes not allowed to sprout and or tilled they will run out of energy and die.
This takes some time and as I said a lot of energy.
Here in Texas it is most effectively killed off by way of parking lots, strip centers and concrete slabs for urban sprawl.
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