Hello,
We have Hibiscus plants along our front walk way and they been in the ground for 2 years but during the winter we have a few days when in dips down into the low 30's. Last year we bought plankets, they are just some green material that are suppose to work as blankets but they don't. Our plants did suffer from these plankets because water , and dew goes right through them and it freezes up. What is the best way to protect these plants without pulling them out of the ground? Thank you.
