Nepenthes rajah is comparable to that experienced in nature, since Borneo lies on the equator. Pure long-fibre "Sphagnum" moss is an excellent potting medium, though combinations involving any of the following – peat, perlite, vermiculite, sand, lava rock, pumice, "Osmunda" fibre, orchid bark and horticultural charcoal – may be used with equal success. The potting medium should be well-drained and not too compacted. Moss is useful for moisture retention near the roots. The mix should be thoroughly soaked in water prior to potting the plant. It has been noted that "N. rajah" produces a very extensive root system (for a "Nepenthes") and,
Abbotts Moss Nature Reserve quaking bog occurs when plants such as "Sphagnum" mosses and cotton grass "Eriophorum" sp. colonise the surface of a waterbody and form a floating mat of vegetation. Locally uncommon plants growing here include common cottongrass "Eriophorum angustifolium", cranberry "Vaccinium oxycoccos", round-leaved sundew "Drosera rotundifolia", crowberry "Empetrum nigrum", hare’s-tail cottongrass "Eriophorum vaginatum", bog rosemary "Andromeda polifolia", white beak-sedge "Rhynchospora alba" and the carnivorous lesser bladderwort "Utricularia minor". Dragonflies include the nationally rare white-faced darter "Leucorrhinia dubia" and the locally uncommon downy emerald "Cordulia aenea" and black darter "Sympetrum danae". Abbotts Moss is one of only two sites in Cheshire where adders