I moved from Atlanta to Boston and I left my plants on the U-haul truck for 3 days, and now they look horrible. They are cold, maybe frozen, limp and very wet. What do I do?
I am sorry to hear about your plants. If the stems are alive, they have a chance of recovering. These articles will help:
https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm
How does putting a sheet over a plant protect it from freezing? I know a sheet over me would not be much help. Never have been able to figure this out.
It helps to keep the stored heat from the plant and ground localized to the plant and helps keep the truly cold temps at bay for a short period of time. It works similar to the insulation on your house.
We live in southwest Florida and we just had a bad freeze. We covered the plants with sheets, but they got hit anyway. Now that we have frost damage, do we just let them grow out or after a week or so trim out the damaged leaves/stems and hope for the best?
I am sorry to hear about your plants. This article will help you with that: https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
My plants and trees have been hit by a freeze. The leaves have all wilted. How can I take care of them. Should I cut them back now or how long should I wait?
This article will help you: https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
Covered plants for expected freeze - RAINED. Now WET sheets covering plants. Do I need to do anything now that the coverings are SOAKED? Texas freeze - 4 nights expected
They will need to be dry. What you can do is dry the sheets, cover the plant with the sheet and then cover the sheets with plastic (trashbags or drop sheets work well). Do not allow the plastic to come in direct contact with the plant as this will harm it.
If you are expecting several days of cold, sheets will not be enough. This article will give you some ideas to help keep your plants alive during the cold:
https://www.gardeningknowhow.com/plant-problems/environmental/protect-plants-in-freeze.htm
Will brown leaves come back out, or should they be trimmed back after a heavy frost and freeze?
I would wait until spring to cut back the plant, just in case another freeze occurs. These articles will help you:
https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm
https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
Is there a way to save plants after they have experienced shock from a move and cold temperatures for an hour?
The following articles should be of some help to you:
https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm
https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm