Bloomerang

Bloomerang is a new plant in Plants vs. Zombies 2: It's About Time. "The Bloomerang’s shots reach the far end of the screen and hit enemies a second time on their return" according to information here.

Plant Food Upgrade
The Bloomerang's Plant Food Upgrade is that it blasts boomerangs in four directions, fowards (like always), backwards, up, and down.

Suburban Almanac Entry
Bloomerang

Bloomerangs can hit up to three targets in their lane, twice!

Damage:  normal

Range:  multi-hit

Special:   can hit up to 3 targets, with two hits each

As the first new member to your home defense team, Bloomerang enjoys long walkabouts with his friend, Koala Bear, and listening to his Bob Barley albums out back."

Cost:   175

Recharge:  fast

Trivia

 * Bloomerang is a portmanteau of "bloom" and "boomerang".
 * The boomerangs that the Bloomerang throws are actually its petals.
 * Bloomerang fires very slow at first, then fires at normal speed after firing the first boomerang.