Best way to add animation to trees, grass etc?

I want my maps to feel more alive, so I want to add animations to trees, grass and other background objects. But what would be the best way to do it? Right now I just do it with events, and I don't mind doing it like this, but Im scared it may slow down the game eventually. Is there any other way to do it? Or maybe I shouldn't be scared to do it with events in the first place? Does MV slow down easily because of too many events?

the only animated tiles are the A1-tiles. you could use that for grass and the like, but you need to keep in mind the limitations: Vehicel movement (ship and boat) is fixed to specific A1 tiles, which means that you could have a ship-vehicle moving on grass if you allow ships on the same map where you used A1 for other animations than water.

Decorative events are the usual way and it should not cause problems unless you're using them execcively.
If a map has nothing but decorative events, then you should be save with up to a few hundred, but as soon as the map (or the common events) contain parallel process events, that number can go down depending on how the parallel process is written. A single very badly written parallel process can lag even the most powerfull computer, but with a bit of care and optimization a few parallel processes should be OK.

Events are the way to do it but you can also Check out Yanfly's gridfree doodads plugin. You can animate doodads with more than 3 frames.

Thanks guys! I guess I'll do it with events then, and also check the plugin :)