Dendrobium kingianum is usually a lithophyte (growing on rocks) but can sometimes be found as an epiphyte (growing on another living plant, but not parasitic in nature). Pseudobulbs are slender, up to 35 cm long with a thick base. There are usually 3 to 6 thick leaves at the top of each pseudobulb. Flowers occur on stems from the top of each pseudobulb in racemes of 2 to 15 flowers per stem. They are usually pink to deep mauve but white forms are known. Flowers are seen from late winter to spring.