Quite an interesting discussion. About month ago, I gradually introduced a Den. nobile hybrid, a Den. kingianum and a Schomburgkia lueddemanii to the sun. Last week in Boston it got incredibly hot. The leaves on the Schomb. got bleached out, the Den. kingianum hot a few bleached spots on some of its leaves and the Den. nobile's leaves turned a bit yellowish. I left the Schomb. where it was because it seemed so damaged, the Den. kingianum I moved to a slightly shadier spot and I moved the Den. nobile into my 'sun room' greenhouse where it gets afternoon sun, filtered through the glass, but it gets sun from above which is better than a window sill. These are relatively new plants, the Schomb has never bloomed. I am interested to see if the Dendrobiums bloom again for me.
Bud, it is amazing that you are able to grow orchids around tall buildings in New York City.
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