by Eric Neubauer
In 2018, wheat was planted here at my property, where there was once blackland prairie. Since then, nature has taken over. A mix of native and non-native grasses and forbs quickly came up by themselves. Each year the mix changed, but by 2021 it was obvious Johnson Grass was a huge threat and would eventually outcompete and overwhelm everything else. I was reluctant to use herbicides, because they might affect the plants and animals that I wanted to keep. For example, it’s unlikely anyone tested the effect on wolf spiders. So, I was left with only mechanical means of control.
I decided to focus only on the Johnson Grass to keep it simple. I came up with several plans depending on how thick the Johnson Grass was and whether an area would be mowed. One image shows an area where I pulled the Johnson Grass and ragweed starting early in the year. It looks pretty nice now and only a few unwanted seedlings have come up since. I’ll mow this area in early spring before the bluestem comes up and after it goes to seed. You can see some Johnson Grass I haven’t gotten to lurking in the background on the right.
The other image shows where the mowed area meets the unmown area. Johnson Grass doesn’t like regular mowing. There are numerous small plants in the foreground, but these have limited root systems and will die or are easy to pull. King Ranch Bluestem tolerates regular mowing. I mowed around the plant in the foreground and now it’s going to seed. I mowed around other plants, primarily legumes, and hand pulled any Johnson Grass that didn’t get cut. In the background is a mass of Johnson Grass. I’m hand pulling this. You can see little of anything is left except leaf litter where I have pulled it to the right. Some will regrows, and I’ll have pull it again, but subsequent pulling goes much quicker than the first. In the meantime, other plants, such as asters, now have enough light to spout and grow. By the way, if you hand pull Johnson Grass, wear good gloves. Otherwise it can give you a nasty cut if your hand slips.
Other areas I’ve promoted with selective weeding are stands of goldenrod and a large patch of frogfruit where water collects sometimes.
It’s possible another threat will rise out of the several species of non-native grasses present, but for now I have a plan.