Ms Weeder is a person in the game that will give you some missions like the rest of them

if you go on your map you should see liitle sqares with little thing inside them,well look
for one that hads a shovel inside it and then click on it and you will see her. :]

Ms weeder is a Gardeneand she is just like Chef,DR.FG and Suzy Mcdress.Just keep going
around the island and then when you find her she will be on the map and she is the little
shovel.

but how do you water the banana tree for her

i can not believe i did not see her