An update for my old post
http://www.orchidboard.com/community...arah-diba.html
I placed the plant high up in my greenhouse where it recieved unfiltered light during the morning hours. In the summer I removed the nearby acrylic paneel to let in fresh air for the exhaust ventilator on the opposite side. I guess that thousands of m3 of fresh air blew in per hour. Temperature was close to 40°C on hot days and 12°C on cold rainy days. Percivalianas are hardy, they not only stand but seem to love the extremes.
Last year there were 6 flowers, now 10.
C. percivaliana semialba specimen
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