When to clip old stalks on orchids?

Old orchid stalks should typically be clipped after the blooming period has ended and the flowers have wilted. For many orchids, such as Phalaenopsis, you can cut the spike back to just above a node if it remains green, or all the way to the base if it turns brown and dry. This encourages new growth and potentially a new flower spike. Always use clean, sharp tools to avoid damaging the plant or introducing disease.