Phal bellina disease help

[estación seca]

What are your growing conditions? Temperatures day/night, humidity, light? How are you watering? When was it last repotted? What medium is it growing in?

[emartinm28]

Originally Posted by estación seca

What are your growing conditions? Temperatures day/night, humidity, light? How are you watering? When was it last repotted? What medium is it growing in?

Temps are around 70-73 in my cabinet. Humidity is high, on lower shelves I have a maidenhair fern and a rabbit’s foot fern on lower shelves. Using artificial grow lights, light is sufficient that my Howeara lava burst blooms multiple times a year. Repotted over a year ago the pot is filled with roots. Mixture of bark and sphagnum moss and watering when the roots turn a silvery color

[thefish1337]

Originally Posted by emartinm28

Temps are around 70-73 in my cabinet. Humidity is high, on lower shelves I have a maidenhair fern and a rabbit’s foot fern on lower shelves. Using artificial grow lights, light is sufficient that my Howeara lava burst blooms multiple times a year. Repotted over a year ago the pot is filled with roots. Mixture of bark and sphagnum moss and watering when the roots turn a silvery color

you should put a hygrometer and see how humid your grow area gets. At humidity above 80% and a temperature of 70F or lower lower your vapor pressure deficit (VPD) drops below 0.5 kPa. this means that transpiration will slow and water isn't moving through the plant, not through the leaves not up through the roots. ideally you want to raise the daytime temperature because Phals are thermophilic and do better in higher temps but that will also improve transpiration rates and keep your plant drinking and breathing. if you follow the chart I posted below you will also see that you can decrease humidity as well, at the cost of growth rate. but you should see the disease pressure decrease. improving air circulation and freshness can help you avoid the disease issues you are seeing as well.