This might work for some & not others, SO USE AT YOUR OWN RISK, but you can get unlimited ferts by doing this:
(You will need your User Name & Password)
Go in game, fert your plants as much as you can, then exit game, go to Settings > Applications > Manage Applications, go to Garden of Weeden, then clear Data.
Then go back to Garden of Weeden, log back in, & you should have 6 more ferts to use, & repeat as necessary.
