I was wondering if I could put up a border and put more dirt around the ferns at the base to make it deeper or if should just leave them alone?
You could do either, but I would add some backfill. This article will help you to grow asparagus:
Log in or sign up to help answer this question.
You must be logged into your account to answer a question.
If you don't have an account sign up for an account now.
Learn FromYour Peers onOur Blog
Friend's Email Address
Your Email Address