User blog comment:GamesterD/Most Useful 10 Plants and Least Useful 10/@comment-24843074-20160417153847/@comment-5760976-20160418002141

Actually, Excavator Zombie is just immune to Primal Peashooter's projectile, it can still be stunned and pushed back though, so in Lost City, it can be used in a combo with a pult plant.