72 hour heat pack for shipment of tropical plants in cold weather.

It can raise the box internal temperature by an average of 10 degrees, so its only recommended for shipping if temperatures are above 25* F to protect the plants from frost. In colder  than this we will await warmer temperatures to ship, even with a heat pack.

A heat pack will still allow us to ship sooner if temperatures are borderline, and help prevent frost or cold shock in those cases.