Encircle the potted tree with wire, like you’re building a fence around it. Then, drop in the mulch or hay, completely covering the tree from the ground to the top of the container. This insulation should protect the tree’s roots from winter’s coldest temperatures, which are the most vulnerable part of the tree.

Can you leave trees in pots over winter?

Unfortunately, containerized plants often experience severe winter injury and often death if unprotected. In containers, the roots of the plants are exposed to below-freezing temperatures on all sides. As temperatures fluctuate, the soil thaws and refreezes causing the plant to heave out of the soil.

Should I water potted trees in winter?

Water the tree deeply and often enough during the winter to keep the soil slightly damp. Wait for the soil to become completely dry to the touch between watering sessions.