Sure. I put mt container-grown tomato plants out early last spring, and we had a sudden cold snap, with temps dropping down to 28Ã‚Âº F. The plants were far too big to cover with a 5-gallon bucket, so I just pulled the containers up against the wall of the house where they could absorb the radiated warmth from the wall. Then I dropped a plastic yard bag over each one.
Obviously, you can't have that kind of flexibility with in-ground plants, but anything
you do can tip the balance in favor of a plant's survival. Just cover them with whatever you have on hand.
One trick I've used in the past was to collect as many of the darkest colored 5-gallon buckets (that have lids) as I could find. Fill them with water and set them out among your plants in the sunlight during the day. Then, put the lid on each water bucket and try to place one beside each plant and cover both the plant and its water bucket with some kind of cover. I've used old blankets, old worn out quilts, yard bags, even old afghans to cover my plants. I put tomato cages over the seedlings to support the drapes, so the heavier coverings wouldn't break any tender branches. The bucket of water will release the warmth it absorbed from the sunlight, and it's enough to keep your young plants quite comfy, even through a very cold night.
I once used these 5-gallon buckets of water inside a little greenhouse I used to have. It kept the greenhouse warm enough to allow my plants to thrive all through the winter. (Of course my area is known for its mild winters, as well, so I wasn't really fighting much of a battle.
"Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?" - Douglas Adams