We tried to keep our fall tomatoes going longer by making a "tent" for them on frosty nights. It worked pretty well.
At night we put in a couple of lights and it worked really well.
In the greenhouse, we have had two crops of radishes. They are quick and easy to grow.
The tomato plants inside the greenhouse set fruit and are starting to ripen.
Our lettuce is doing wonderful. We have several leaf lettuce varieties and it grows back quickly.