When a substance that is used or produced during cultivation is carried through the air to a neighboring crop in an uncontrolled manner. In cannabis cultivation, the two largest culprits for environmental crossover are pesticides and pollen, which can reduce yields and cause a crop to fail regulatory requirements.
The environmental crossover from the neighboring peanut field that used airplanes to spray pesticides on their crops introduced unwanted pesticides into my flower.
My female plants began producing seeds as a result of the environmental crossover from the pollen produced in the neighboring cannabis nursery.