Protecting plants when it's cold outside
Pray for snow!
Of course, you have added leaves around new plantings to protect them from sub-freezing temperatures and frost heaves, but now it’s time to look for more help from Mother Nature.
Snow is a natural insulator and a very efficient one—ten inches of snow provide the same insulation as six inches of fiberglass. Snow keeps roots happily buried, not subject to freeze and thaw cycles.
Skip the salt. Once the snow arrives, avoid using salt on sidewalks and driveways. Sand or kitty litter will provide traction and even assist in melting as it warms on sunny days. Best of all, there will be no damage to your plants now, or when the ground thaws in the spring. The sand or litter will disappear into the garden soil without damaging to roots or poisoning the soil.