| Dave Hallinan notes that a mature Black Henbane plant will produce about 50,000 seeds, which are about the size of a grain of pepper. The seeds are usually distributed by falling to the ground, but they are also small enough to be carried by the wind. If the ground is disturbed and moved around the seeds are also moved. They can remain viable in the soil for 5-7 years. He explains that you may think you have the Black Henbane plant controlled, but if the climatic conditions are just right for germinating the seeds, you might have a great big new patch next year.
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