Please add your heat pack to your cart with your plant before purchasing! The item is to be added to plant purchases only. Please use discretion when adding a heat pack. Check your weather before adding heat. I don’t check your weather before I ship so please use your judgement to see if the heat is necessary. I recommend using heat packs when the daily average temp is below 35. Please ensure you are there to collect your item promptly after delivery. If your item is delayed in transit by USPS your heat pack could expire.