User blog comment:Milesprower2/Vasebreaker Challenges/@comment-5797509-20130221012746/@comment-5792287-20130222114628

The normal Zombies are easy enough to beat with the other Wall-nuts, Spikeweeds and the Squashes, as I have done 7.

For 9, quite often the Plantern is in one of the last vases I break and I still do it, so you don't need the Plantern.

P.S. Don't just assume that something is impossible if you can't do it.