For the past 2 weeks my neighbor's 40 ft. purple orchid tree has been raining pods and spreading seeds on my immaculately maintained yard. I just bought this house six months ago and I hadn't considered this when I landscaped. Now the seeds are starting to sprout and I am losing sleep at the thought of having to weed them all out of my flower beds. In the lawn they'll just get mowed down so I'm not terribly concerned. Is there a way that I can discourage germination?