It's too long
A trim with me is typically 1/4 or less off. If you want more trimmed, you have to ask for it because I automatically lean on the side of growing it out.
Maintaining a length: Hair grows 1/4-1/2 an inch a month, so you'll need to get it trimmed every 4-6 weeks to maintain your length and keep it healthy.
If you're growing your hair out, you need to get it trimmed every 6-8 weeks. This keeps it healthy while it's growing out.
Schedule a haircut. (If you're new to Serena you'll need to visit the consultation page first.)