User blog comment:Zombieman1350/Combine Your Plants/@comment-3977620-20110826154901

How about combining any catapult plant with a Threepeater? This will increase the catapult plant's range to three lanes. The only problem I may find with this is that the zombies in the protected three lanes may not be directly adjacent to each other, so I don't know if the combination plants will fire to the zombies where they happen to be or if the projectiles will only go as far as the closest zombie.