Dwarf bonanza patio peach tree
Can a dwarf bonanza ( patio peach) tree survive Michigan winter or should it be planted in a pot and put in garage in winter?
Washtenaw County Michigan
Bonanza Dwarf Peach Tree grows well in hardiness zones 6 through 9. Washtenaw is in hardiness zones 5 or 6, depending on where you live. The tree does not tolerate temperatures below 0°F. It grows to about 5 or 6 feet tall.
When it is grown in a container, choose a pot large enough to accommodate its root growth. If you intend to leave it outside during the winter, choose pots that are plastic, foam or thick concrete. When a frozen root ball expands it could cause a ceramic or terra cotta pot to break. Plant it in good potting soil in a pot with drainage holes.
For the tree to survive the winter out of doors, store the it next to a heated wall, protected from cold drying winds. You could also insulate the pot, by packing leaves, mulch or straw around it. Or you could place it in a bigger container and fill the space between the two pots with straw or leaves. That said, considering the way Michigan weather changes from one day to the next, there is no guarantee that the tree would survive the winter in a pot outside.
An alternative option would be to move it inside an unheated structure like a garage or porch where it is not exposed to cold drying wind and a few more degrees of warmth are added. Give the tree just a little water a few times over winter to keep the roots from getting too dry.
I hope this answers your question and helps you make a decision. Thanks for your question. Good luck with your tree.