- The coco coir pellets contain absolutely no peat. They are made from coconut fibers, which are a by-product of harvesting coconuts. They are ideal for starting seedlings and can be used to replace traditional pellets. Coco coir pellets are very easy to handle and do not produce any mess. - Simply place them in the relevant slots in the bottom of the mini greenhouse and pour water over them. The pellets will absorb the water within minutes, which will cause them to grow in height without losing their shape.