All our diary methods are different...if you like to update and post photos more frequently, then the people who follow you will see thats how you do things. Some people edit and update their diaries every day. So everyday theres something new. It's up to you what your style is. But yes it can be edited as much as you like.
Hey Jollyfarmreview! You can edit them at anytime during the grow! My recommendation is to do it on the website instead of the mobile app (if you have it), as it's generally much faster than the application.