The Jettisons

Difficulty: Very Hard (most levels), Easy-Medium (Endless Zones)

The Jettisons is an achievement in Plants vs. Zombies 2: It's About Time. It requires the player to clear out 30 or more Jetpack Zombies in one level using Blover. It is worth 500 XP on Android devices.

Strategies
You can try getting far in Terror from Tomorrow and when there is a huge wave, use the Blover. Keep in mind you have to blow away Jetpack Zombies, if you aren't doing the Blover combo.

If you do not plan on playing Terror from Tomorrow too much, remember that this achievement works on any other zombie. As a result, Ancient Egypt - Day 18 (Last Stand 1) is an excellent idea in doing the achievement, as there are a lot of zombies in that level. The player just has to use two columns of Snapdragons combined with Wall-nuts (Snapdragons are short ranged, making them ideal for this choice as they do not kill zombies from far away) and plant a Spring Bean behind their defenses and when enough zombies swarm the screen, use Plant Food on the Spring Bean and immediately plant a Blover which blows them all away.

Dead Man's Booty is also an alternative to earn this achievement. It must be done on a four-flag level. The probability is 30% chance. On that level also, either Swashbuckler Zombies, Seagull Zombies, Imp Cannons, or Pirate Captain Zombies must be present so it can be completed easily.

Keep in mind that you do not need to clear out 30 zombies at once, just in a single level.

Trivia

 * Despite saying that Jetpack Zombies have to be blown away, any other zombies that are in the air also count, making it possible to obtain it via the Spring Bean - Blover combo, in which the player feeds Plant Food to a Spring Bean and use a Blover immediately.
 * The achievement's name is a reference to a cartoon named The Jetsons.
 * It is also based on the word jettison, which means to discard referencing of getting rid of flying zombies.