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It’s not blooming yet! Sometimes these critters take forever…

That fan is likely not doing as much cooling as you’re giving it credit for, because plants don’t sweat. It’s evaporative cooling that makes us cooler in a breeze, not the breeze itself. I have my plants outdoors in the summer. When I travel, I put a lawn sprinkler on a timer. Orbit sells an...

A paraphalenopsis, perhaps?

Agreed. That looks like erwinia, which is a fast-=moving bacterial infection, easily spread with splashing water. Definitely use the Phyton 27.

Right you are! I missed that photo and was only looking at those in the later post.

Where? I don't see an dendrobium in there anywhere.

Damaged cells will never "recover". That doesn't mean the plant is particularly at risk; it may mean nothing more than "something happened". If it doesn't happen again, the plant will be fine.

“In my book” is just an expression related to opinions. Like everything else in orchid growing, “one size” definitely does not “fit all”, so there is no pat answer to “when to recharge the potting medium”. All potting media “build up” over time, both with minerals and biofilm. Organic...

Read my more recent posts, Charles.

Certainly possible as foliar uptake by orchids is generally poor, not nonexistant. Also, if your unspecified fertilizer contained urea, that is also favored in foliar uptake to nitrates and ammoniums.

Not necessarily. Misting is not limited to foliage.

I think he may be poisoning his plants. He fertilizers at about 25 ppm N most waterings; plain water once a month, but he only pours about a cup of solution per watering, with no flooding/flushing. Editorial comment about nutrient deficiencies: I think most of the published diagnostics don't...

Lance, what you described is not the leaching of nutrients by the pure water, it is starvation because the plants had no source of nutrition other than their own tissues, and that eventually ran out. In my book, replacing the medium is needed. That, or a very, very long soak in copious amounts...

I do not know the feeding regimen of that grower, but I have asked, but he stated this is a plant he has had for about 10 years. FWIW, my plants have gotten K-Lite (12-1-1) for the last 13 years, and I have yet to see any such deficiency.

Buildup is related more to drying than it is to what is being applied. If I soak a sponge with a 10% "whatever" solution and seal it in a ziplock bag, it will ALWAYS contain that same 10% solution. If I let the solvent evaporate, however - which happens at the surface, moving inward...

Not my plant, and it appears to be in pretty good shape otherwise,

Who says nutrients can be leached by the use of pure water? I have never seen evidence of that or anything documented. Any reference I have seen relates to leaching of nutrients from soil, resulting in deficiencies and/or root damage. As orchids have evolved getting little beyond rainwater, I...

Foliar feeding depends, to some degree, on the type of plant and its maturity. Some plants, such as paphiopedilums, phalaenopsis and many vandaceous types, develop thick, waxy cuticles on the leaves, likely an evolutionary adaptation to slow water loss. They tend to be thin on immature plants...

Leaf turgidity is related to water pressure, no? If growth rate + transpiration losses > uptake rate, the result is floppiness. (just an engineering guess)

Only 8 left at this price.