This level is very similar to the last one, but with the addition of the Barrel Roller Zombie. The Barrel Roller Zombie pushes a barrel that instantly kills any plant in front of it until destroyed, where two Imp Pirate Zombies appear in the rows above and below the barrel. The counter to this zombie is the new Spikeweed. This plant can get rid of the barrel. The Spikeweed will be destroyed in the process.
The small number next to the zombie icon means that zombie will always appear in that lane, with 1 being the topmost lane and 5 being the bottommost one.