The core of this configuration is the Gloom Shroom. The 2x3 Gloom Shrooms on the right most part of the pond protects you from both water zombies and land zombies on the 2nd and 5th rows.
Since your 2nd to 5th rows are already protected, you can give up two slots on the 2nd and 5th row on the rear to counter the digger zombies. Thus, on 1st and 6th rows 3 winter melons can be placed to slow down land zombies.
Cat tails on the 5th and 6th columns of the pond counters the Balloon Zombies.
The rest of the spaces, fill it with corn cobs which is essential in killing the Gargantuar (regular or Red Eye) and Zomboni. If possible attach a pumpkin to all units.
Lastly, fill the 8th and 9th column with spike rocks.
