Cob Cannon is an upgrade plant, which can be purchased from Crazy Dave at his shop. It must be planted on two side-by-side Kernel-pults, which must be placed one in front of the other in the same lane, horizontally. Cob Cannons cost $20,000 to buy in Crazy Dave's Twiddydinkies. It takes exactly 36.41 seconds to give out a new corn cob.