What do you do with pitfall seeds on Animal Crossing wild world ds

I have animal crossing city folk for wii and on mine you can bury them in the ground and if you or the people of your town fall into it they get mad. Its really funny to watch! that's pretty much the only use, that or selling them and Nook's. The name "pitfall" is a "pit" you plant in the ground so you "fall" in it.