Build and Runes
Saplings can be outrun if you’re fast enough.
Maokai’s Twisted Advance will follow you even if you Flash. This can be used to bait him into the middle of your team.
Try to stay outside of hit ultimate, as his teammates will take less damage, and his ultimate will deal increased damage when it ends.
When going again top lane Maokai, bring an ignite if you’re an all in champion, and use it immediatly to nullify his passive. This will make it a lot easier to burst him down, especially in early levels, where he typically is squishy without rod of ages.