Stickanswered grow question 7 years ago Hi there! Well, pollination happens very quickly, and one small single banana hitting your soil can produce hundreds of seeds and 'cannibalize' your buds. Plus, if you're growing outdoor, you're not taking the risk for yourself but also for all the growers in the area (up to 5km around you). I would kill the plant in a closed and impermeable environment, to ensure pollen is not spreading around. I'll be around, keep us up-to-date and good luck with your last weeks!