Repotting Store-Bought Phalaenopsis from Moss to Bark

Lydia's two September Phalaenopsis are dropping blooms; in 4-inch pots with moss. Expert: yes, repot now. Find fir bark mix at garden centers (Lowe's, Home Depot). Target ½-inch particles; strain out dust. Soak mix while unpotting. Moss-grown plants often lose roots—remove mushy ones. If most roots healthy, go 1-inch larger pot. Lots of drainage holes. Soak aerial roots before working into mix. Rotate pot to align roots. Tap mix in. Resume watering in 1 week.