I went from harming my white Phalaenopsis from incorrect ... Incorrect watering is the main culprit of killing off orchids and orchid root rot is not a rare sight for orchid owners.
Trim off dead roots, bulbs, stems, and canes. A healthy, living orchid root is white, Kondrat says, while a dead root looks like brown string. If a leaf on your orchid looks unhealthy, cut it off.
Every time you take your orchid to the sink to water it, Kondrat recommends inspecting the plant for signs of mealybugs. They look like white fluff on the underside of leaves. Use peppermint oil ...