cattleya dowiana roots

[Blanka]

My cattleya dowiana's new roots are black and dry at the ends. She was very healthy till now and has two young pbulbs. One is mature pbulb and one is not mature. I water her weekly. What is the reason for roots drying? Is it dangerous?

[clintdawley]

Root tip die back can be do to low humidity. Root tips blackening is usually an indication of over-fertilization. Try leaching the pot and put it in higher humidity. These plants can decline quickly in the winter..but this is usually indicated by a p-bulb turning black and the infection spreading.

My cattleya dowiana's new roots are black and dry at the ends. She was very healthy till now and has two young pbulbs. One is mature pbulb and one is not mature. I water her weekly. What is the reason for roots drying? Is it dangerous?

[Blanka]

Thank you, clintdawley.
Humidity was about 30%. I had replaced the plant to another room where humidity is 45-50% now. May be it will help. p-bulbs are good but some leafs is brown at edges. But it is not a rot, these leafs are such from summer and they are dry.