Maokai hurls a sapling to a target area. The sapling becomes implanted in the ground, warding a nearby area for 30 seconds. After a 1 second delay after landing, the sapling will seek out nearby enemies. When an enemy approaches, the sapling will chase for up to 2.5 seconds and explode in an arcane blast that deals 25 / 50 / 75 / 100 / 125 plus 7 / 7.25 / 7.5 / 7.75 / 8% (+1% per 100 ability power) of target's maximum health as magic damage to enemies and slows them by 35% for 2 seconds.

Saplings have 400 base movement speed increasing based on Maokai's boots:
Boots of Speed: 425
Most upgraded boots: 445
Boots of Swiftness / Boots of Mobility: 460

Saplings tossed into brush last 30 (+2.5% of Maokai's bonus health) seconds and have a larger detonation radius. Enemies caught in the explosion take 67% damage on detonation plus two additional ticks of 67% damage over 2 seconds.

Sapling Toss's damage against non-champions is capped at 300 (empowered sapling damage over time has its own cap, for a total of 600 per empowered sapling)