Board Thread:Plants vs. Zombies Wiki Discussion/@comment-6593079-20130222073026/@comment-5792287-20130329132344

Gloom-shrooms attack EVERY enemy within range, and one Gloom-shroom can easily kill a Conehead.

Two Starfruit will struggle with a Conehead. Glooms may charge slowly and cost a lot, but they are more effective than any amount of Starfruit, especially against groups.