User blog comment:PvZ/I, Zombie Endless/@comment-3124603-20101024044532/@comment-1675411-20101024110123

I misread, thought you wrote Survival Endless. (I hate only being able to edit at 10:00 at night.)

For strategy, go for the Magnet-shroom first, then the Threepeater. Whenever you have a row with a lot of instant kills send an Imp. Imps can survive a single Spikeweed, so they can get pretty far sometimes. Pole Vaulters may make more sense than Conehead Zombies for some rows. Whenever you get a lawn of mostly Scaredy-shrooms or Starfruit, send Buckethead Zombies and as it makes the Scaredy-shrooms hide or eats the Starfruit send zombies in other rows.