User blog comment:Milesprower2/Vasebreaker Challenges/@comment-5797509-20130221012746/@comment-5792287-20130222112827

7 is the only one I remember doing, it isn't impossible, you just need about six Spikeweeds and a Wall-nut at the end of the path to kill the Buckethead.

9 should be possible, as Threepeaters and the Potato Mine aren't much use, and I've done it without using the Plantern.