Allowing users to create new blogs

I can't work out how new subscribers can create their own blog.

What I've done

In Site Admin/Options I've allowed new registrations by checking the "Enabled. Blogs and user accounts can be created" button.

Added a new user as a subscriber.

Created a blog for the new user.

What I thought would happen

I expected the My Blogs section of the new user's admin panel would provide a function for them to add a new blog.

What is happening

In My Blogs section of the admin panel of the new user the primary blog displays as expected but there is no function that allows the user to create a new blog.

I'm sure I'm missing something basic but I'm not sure what. Any help would be greatly appreciated.