greenhouse veggie

I have two new raised beds sitting under a greenhouse frame that is 5x16 and 30 inches high. I'm curious as to what is best to grow under them. I'd like to put carrots and onions but I'm wondering if it would be too hot.
Any suggestions?
Thanx!
..
Zone 5a
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.