I have a question regarding hijab. Am I allowed to wear a dress with patterns, such as flowers or dots? Or is it considered adornment? My dress is modest, loose, long, covering and not see-through.

If in your society such a dress attracts negative attention from men and is considered an adornment, then it would be haram. Otherwise it would be permissible. Different societies have different conditions and perceptions, so you have to consider the overall perception in your particular society.