A person pulling out weed in the vegetable garden
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The Best Time Of Year To Stop Lawn Weeds In Their Tracks
For certain pesky weeds, such as broadleaf plants, autumn is the best time to eliminate them, as they'll be at their weakest, having just come out of their flowering seasons.
Since these weeds tend to germinate in the fall, they're not only easier to identify, but they're also easier to kill, as the seedlings are still weak during this time.
In the fall, it's easiest to pull plants like prickly lettuce, and herbicides, too, can reach the root system, weaken the plant for the winter, and ensure they don't grow back.
The plant naturally is weaker during winter since it tries to survive low temperatures. Weakening it further just before the winter prevents it from surviving the cold season.