When a Pokémon with Seed Sower is hit by a damaging move, it summons Grassy Terrain for five turns, unless Grassy Terrain is already present. This can be extended to eight turns if the Pokémon is holding a Terrain Extender. If hit by a multistrike move, the first strike will activate it.
Seed Sower activates before the effect of the moves Steel Roller and Ice Spinner is triggered, thus removing the grassy terrain.
When Arboliva is hit by an attack, it releases pulses of green energy from its body, creating a Grassy Terrain that causes the plants around it to grow at an increased rate, boosts the power of Grass-type moves, and heals the damage done to nearby Pokémon.