Open-pollination is when pollination occurs by insect, bird, wind, humans, or other natural mechanisms.Because there are no restrictions on the flow of pollen between individuals, open-pollinated plants are more genetically diverse. This can cause a greater amount of variation within plant populations, which allows plants to slowly adapt to local growing conditions and climate year-to-year. As long as pollen is not shared between different varieties within the same species, then the seed produced will remain true-to-type year after year.Hybridization is a controlled method of pollination in which the pollen of two different species or varieties is crossed by human intervention.Hybridization can occur naturally through random crosses, but commercially available hybridized seed, often labele