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Cattleya walkeriana developing dark spots and yellowing on leaves Yellowing while developing sheaths
 
 
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Old 10-06-2020, 12:44 PM
Steve83 Steve83 is offline
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Join Date: Aug 2020
Zone: 7b
Location: Harrisburg, PA
Posts: 190
Yellowing while developing sheaths Male
Default Yellowing while developing sheaths
Epc. Magic Wand (a SVO hybrid which I purchased locally), Dinema polybulbon, and C. aurantiaca, all started yellowing as soon as they began to develop sheaths.

Dpolybulbon.jpg - Google Drive

EpcMagicWand.jpg - Google Drive

C.aurantiaca.jpg - Google Drive


Everything else looks great, and nothing has changed as far as culture for them, which is as follows.

315w cmh
Temp 83f day, 69f night
Humidity 80-65% day, 70% night
Watering is usually 17 ppm N K-Lite 1-3x day (only the aurantiaca is in a pot), unless its a KelpMax or Quantum day.

I'm leaning to nutrient deficiency, but am not sure where to start.
Last edited by Steve83; 10-06-2020 at 12:53 PM..
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