Cordyline australis 'Red Star' is rated Zone 7–9. Jeannette, PA is Zone 6a (-10 to -5°F). Even with mulch, stone, and porch proximity, the root zone will freeze solid.
No amount of outdoor wrapping saves a Zone 7 plant in Zone 6. Indoor storage is the only way.
Overwintering Dahlia Tubers in a Cellar (Zone 5): Step-by-Step Storage
Mail-Order Lavender Transplant Shock
Caring for Nipponanthemum (Montauk Daisy) After Frost
Pruning Overgrown Hydrangeas Without Losing Blooms
Overwintering Elephant Ears & Sweet Potato Vines in Kentucky
Overwintering Marigolds and Geraniums in a Wisconsin Greenhouse: Annuals Don’t Perennialize
Red Sister (Ti Plant) Care: Dry Soil, Bright Sun, Warmth
Pruning Heliotropes in November in Southern California: Will They Recover for Spring?
Identifying Heirloom Dianthus (Pinks): Finding the Fragrant Red Varieties of the 1960s
Growing Calla Lilies: Hardiness, Moisture Needs, and Winter Storage
Will Carnations Survive Zone 5 Winter Without Protection? Spring Hill Carnations Hardiness
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