It's Raining Seeds

It's Raining Seeds is a Mini-game that takes place in the Fog area. During the level, it is raining, and the seed packets for plants fall from the sky. If you do not plant a seed packet fast enough, it will disappear. Any kind of plant can fall, except for Flower Pots, Grave Busters, Coffee Beans, and plant upgrades. The Zombies are normal Zombies, Conehead Zombies, Football Zombies, Bungee Zombies, Jack-in-the-Box Zombies, Buckethead Zombies, Newspaper Zombies, and Ducky Tube Zombies.

Strategy
It is difficult to have a strategy for this mini-game, because you cannot predict what plants will fall at a given time. The beginning of the level can be difficult, because you are not likely to get a Plantern and so cannot tell which rows the zombies are arriving in. If you get a Plantern, protect it well, because you may not get another if it is eaten.