Barricade-Shroom

Barricade-Shroom is a mushroom that spreads across an entire column.

Suburban Almanac Entry
Barricade-Shroom spans an entire column

Toughness: Extremly High

Special: Spans a column

Barricade-Shroom likes being called Tough-Shrrom, but no one calls him that

Cost: 275 sun

Strategy
Plant them in the last column to create a very high defense.