Blover

A Blover is a one-time use plant that blows away all fog and all Balloon Zombies.

Blover appears to be a portmanteau of Blow and Clover, the latter being the Trifolium[1] genus of flowering plants noted for it's triple leaves.

Usage
Planting a Blover costs 100 Sun. Immediately after planting, the leaves of the plant spin vigorously, pushing all the fog and Balloon Zombies off to the right of the screen. The Fog stays off the map for 15-20 seconds.

Suburban Almanac Entry
Blover

Blovers blow away all balloon zombies and fog.

Usage: single use, instant

Special: blows away Balloon Zombies and fog

When Blover was five he got a shiny new birthday cake. Blover made his wish, huffed and puffed, but was able to extinguish only 60% of the candles. Instead of giving up, though, he's used that early defeat as a catalyst to push himself harder ever since.

Cost: 100

Recharge: fast

Strategy
It is a lot faster and cheaper to plant one 100 sun Blover than planting five to six 125 sun Cacti. Blovers are a good if you want to devote lawn space to more powerful plants and still keep safe from Balloon Zombies, but are harder to use as you must pay attention to when the Balloon Zombies appear. Balloon Zombies are somewhat slow and the Blover almost always charges in time to clear them all away. If you don't feel like you'll be able to muster 100 sun when you need it, you're afraid you might let a Balloon Zombie slip past your defenses, or you don't want to have to pay constant attention, a row of Cacti would be better for you. As for its fog clearing abilities, a Blover can remove all the fog a lot faster (although more costly) than two Planterns. If you want to see whats behind the fog only in certain situations, you should use the Blover instead so you do not need to waste space on protecting Planterns. However, Planterns are a lot cheaper and provide visibility for as long as you can protect them, so they are more efficient.

Whether to use Blovers or not is mostly a matter of preference, although their Balloon Zombie-stopping ability should usually not be used in conjunction with Cattails (except when a massive wave of zombies during levels like Survival: Endless prevents them from targeting the Balloon Zombies).

Trivia

 * Unlike most plants, whose out-of-combat animations have two beats (up-and-down or side-to-side), Blovers have a four-beat animation (left, middle, right, middle).
 * The only other plant with this characteristic is the Gold Magnet.