Orchids in Taunggyi, Myanmar

Orchids are plants that belong to the family Orchidaceae, a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Along with the Asteraceae, they are one of the two largest families of flowering plants.

However, botanists generally agree that one feature above all others defines the orchid and differentiates it from virtually all other flowering plants: the fusion of the male portion of the flower (stamen) and female portion (pistil) into one structure called the column—often visible protruding from the center.

Most orchids require water once a week. ...
Position your orchid in a bright windowsill facing east or west.
Weekly feeding with a fertilizer designed for orchids.
Repotting in fresh orchid mix when your orchid stops blooming.

After the flowers drop from the orchid you have three choices: leave the flower spike (or stem) intact, cut it back to a node, or remove it entirely. Remove the flower spike entirely by clipping it off at the base of the plant. This is definitely the route to take if the existing stem starts to turn brown or yellow.