What I did was get a medium thick sheet and put in stakes to support it over the plants. Sure some of the plants are hitting some of the sheet but for the most part they are pretty safe. The stems are hardier than the leaves anyway and with the warmth of the light in there they should be enough, with the small area, to keep warm overnight. I weighed the sides down with large concrete blocks. Most of them took both hands to pick up and place carefully. There is also a parsley plant in there with them.
It;s supposed to freeze again Sunday through Tuesday next week so I will probably leave the sheet on until Wednesday and turn the light off during the day as long as it isn't supposed to be too cold during the day.
I used some of our parsley last week in my gumbo. Loved it! Still have a few bowls left over in the freezer, one of the few really good freezer foods. Another of which is the muffins we made, fennel, fig, and chocolate. We made a lot of them about two years ago and I popped one out yesterday to thaw for a couple hours. Almost just like we had made them that day.