Phalaenopsis Root Fungal Growth

[samcordero29]

Hello all,

I gave my phalaenopsis to a friend to take care of for a year, and when I got it back many of the roots seemed shriveled as if from underwatering, but there was also white "fuzzy" fungal growth and small white spots on the roots as if it had been overwatered. I soaked the roots and substrate in physan at a concentration of 1 tbsp/gallon of water for 20 minutes, and since then have been watering with physan+water, but the orchid's condition just seems to get worse. The white growth has reduced in size, but now almost all of the roots are black/dark brown, except for the ones near the base of the leaves, and the leaves are turning yellow and then brown starting from the oldest leaves. All new growth in the leaves has stopped. Is there anything I can do to save the plant?? This is the first time my orchid has been sick so I don't really know what to do.