How long does it take for cocount trees to get cocounts back on their trees in animal crossing city folk?

There are two methods you can use to get coconuts in any Animal Crossing game. The easiest way is to visit a friend or have a friend visit your town and bring a coconut with him/her. If you do not have any Animal Crossing friends with coconuts, you'll have to resort to the second method. This involves checking the beach daily. A coconut will randomly wash up on the shore (my guess would be once or twice a month). Pick it up and plant it within a few squares from the shoreline. Should it grow, you can shake the tree for two more coconuts and proceed to plant those.