Use Insulation-Only When:

•Daytime temps are 45–60°F (7–15°C) and nighttime temps stay above freezing.

•You’re shipping cold-sensitive but not extremely delicate plants (like most Hoyas, small succulents, etc.).

•The route includes mild or variable climates (e.g., going from a warm origin to a cooler destination)

•You want to buffer against fluctuations, like early morning cold or unexpected delays in cold warehouses.

•The package may be left outside briefly (porch delivery, depot holds), and you want to reduce exposure.