Sidesteppin' Seeds is a medal in Plants vs. Zombies: Battle for Neighborville. It is awarded for entering the tunnel near the KPVN station.
Any zombie caught outside the Smell Jar found themselves at the mercy of the Invasive Plants: huge, ultra-scary plants that decided NOW was the time to ruin zombies' fun times.
To unlock this medal, simply head to the tunnel near the KPVN station and stay in it for a couple seconds. The medal will be unlocked afterwards.