Animal Crossing WW Money Trees? I buried 30,000 bells into the ground and grew a money tree...

I buried 30,000 bells into the ground and grew a money tree that had 90,000 bells. Then when I tried to make another money tree, it didn't work. The tree grew, but it didn't own money on it. So I tried again and again and it won't work anymore. Was this a one time thing?
Answers:    yes you only attain a money tree once a year. but you can go forward in time and plant money draw from the money then go final to now. (if you do you get like mad of weeds)
idk, i have that game and i havent be able 2 grow 1 siingle money tree. is there a convinced amount that you have 2 bury?