User blog comment:TraGiggles/Creating the Ice Age world with Starfruity!/@comment-5204503-20140405070152

Well, I guess that frozen Plants should be able to get attacked by non-frozen plants, so they can be unthawed, while the zombies can't get past them because they have to eat the plants first.

It's like a grave/wallnut hybrid, since nothing can get past it.

Also, we already have a 300 sun peashooter.

And finally, I think that there should be a feature which allows you to unfreeze plants for sun. It depends on which plant it is, the more useful the plant is, the more sun you have to use to unfreeze it. i.e. 25 sun for a Sunflower, 50 for a peashooter, and 100 for a repeater.