Commas with Adjectives - Writing English
Use a comma if the adjectives are equally important and give similar kinds of information.
Example: It was a cold, windy morning.
Don’t use a comma if the adjectives are not equally important or give different kinds of information.
Example: He was a clever young man.
Note:
To check if adjectives give similar kinds of information or not, put and between the adjectives. (It was a cold and windy morning.)
If adjectives give different kinds of information, the and between the adjectives doesn't sound right. (He was a clever and young man.)