Pea Vacuum

Pea Vacuum shoots peas; but requires to devour plants in front, back, and above of it in order to do so.

Size of Pea
It depends on how many it devours.

Strategy
Note that you can not control the plants it will devour, so it may take away your strong plants. Plant it around weak plants or plants that you don't need.

Trivia

 * The giant pea takes up a 3x3 area. It is the only pea that it shoots that takes up another area.
 * It can only vacuum up to 20 plants. Which means it only vacuums an area of 10 by 2.