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Overwintering Container Sarracenia in Zone 6a: Garage, Cover, or Heat

Zone 6a grower (nights <20°F) asked best method: unheated garage/greenhouse? Sustained sub-20°F harmful?

Guidelines

Week of low 20s/teens: garage fine.
Single digits: garage + cover.
Spray fungicide before storage; cut dead foliage.
Pots on ground (not benches) when covered.
>1 week extreme cold: add heat to keep upper 20s.
Cold frame, house-wall grouping, mulch + tarp all work.
Key: never exposed AND dry.

Species Hardiness Notes

Tender: VFTs, D. tracyi, D. filiformis "Florida Giant", P. primuliflora, some S. leucophylla ("Titan"). Tough: S. purpurea ssp. purpurea, S. oreophila, S. rubra ssp. jonesii, Carolina S. flava, S. purpurea var. montana.

Carnivorous Plants: Winter Light Requirements for Dormant Sarracenia in Unheated Storage; To Cut or Not to Cut Flopping Sarracenia Pitchers: Nutrient Absorption vs. Aesthetics; Choosing Durable, Attractive Containers for Sarracenia in the Pacific Northwest; Sarracenia purpurea Pitcher "Worms": Beneficial Mosquito Larvae, Not Pests; Overwintering Container-Grown Darlingtonia: Same as Sarracenia; Scale Insects on Sarracenia: Clip Leaves, Use Neem Oil, and Enforce Dormancy; Winterizing Sarracenia flava in Nebraska (Zone 4): Mulch, Garage, or Ice Chest Methods; Sarracenia and Venus Flytrap Dormancy in Tropical Highlands (Cairns, Australia); Sarracenia Seedlings: Indoor Growing for First 1-2 Years; Sarracenia leucophylla Seeds: Outdoor Stratification in Bog Garden

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Overwintering Container Plants in North Georgia: Which Stay, Which Go