An easier way to check is just to go to the happiness checker on the Pokétch and see how many hearts your Budew has. If it doesn't have altleast 2, it won't evolve.

How do I get my Budew to evolve?

14 How To Evolve

This is because Budew evolves with a high friendship level! Once it's friendly toward you, level it up in the daytime, and it will evolve into Roselia. From there, if you want to make this Pokemon even more powerful, you can evolve the Roselia into Roserade by exposing it to a Shiny Stone.

What level does Budew usually evolve?

Budew (Japanese: スボミー Subomie) is a dual-type Grass/Poison baby Pokémon introduced in Generation IV. It evolves into Roselia when leveled up with high friendship during the day, which evolves into Roserade when exposed to a Shiny Stone.