Rose flowers are used as food, also usually as flavouring or to add their scent to food. Rose petals can also be used in tea, and rosehip tea is very popular.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .