Abstract: A plant pillow for protecting a seed or plant from cold. The plant pillow includes an upper pyramid, a base for supporting that pyramid, and a bladder for holding water. The pyramid forms a greenhouse that uses solar energy to heat water in the bladder. When the bladder is placed around a seed or plant the bladder transfers heat from the solar heated water to the ground to protect the seen or plant against cold. The sides of the pyramid are attached to the base via flexible transitions that allow the sides to be lowered to allow access inside the pyramid. A filler inside the pyramid allows water to be added to the bladder.