Prune Phalaenopsis orchids – known as moth orchids – between the dead flower bud and the node, or eye, closest to it along the flower stalk. If the node begins to swell in few days, the plant is making the stem for a new flower. If nothing happens within a couple of weeks, trim the stalk all the way back to the soil. The orchid should produce new blooms the next season.
Cut the stems of non-Phalaenopsis orchids back to the soil surface after the buds flower and the stalks begin to die back.
Move a nun’s orchid to dappled sunlight after its flowers fade. Keep the plant outdoors as long as the temperature stays above 40 F. Feed it a 20-20-20 soluble fertilizer monthly, according to the rates listed on the product label. The time to divide nun’s orchids, if you want to propagate them, is after the flower buds die. Slide the plant out of the pot. Cut through the root system with a knife vertically. Start at the root crown and move the knife down. Plant the root sections into individual planters filled with potting mix. Water the orchid divisions and keep them in the shade.