Plants are a great idea! I've got a few more plant ideas of my own.

Okay, so far I agree greatly with Riot Fearless's plant ideas, they are amazing...so I decided to come up with my own

Teleport plant- Randomly spawns all over the jungle. When you hit it, it teleports you somewhere completely random on the map( which includes inside walls and under enemy turrets)!

Arena plant- Find these in your base (randomly)! Randomly (randomly) teleports an enemy player into a jarvan ult they cannot escape from with you, forcing you both to fight to the death!

Item plant- Very helpful! Whenever someone is losing lane it has the chance to spawn a random plant pod under their turret. Whenever they hit it, it gives them a random completed item so they don't get too behind (no one likes bullies! >:c )

Death plant- Spawns in the river (at random) and the first random champion to touch the river...dies! It's also invisible, so you'll never know its there!

P.S. I also was thinking everything gets a chance to miss even if you land the skillshot, to keep the game balanced. More dynamic damage would be cool like maybe you could do 13-108 damage instead of just 78? _P.P.S. Bring back dodge chance too? _