Quote:
Originally Posted by Ross
I find a few things to be concerned about. First there is a big difference between Orchidarium and Terrarium. You are correct for the terrarium, but very few orchids will do well under moist stagnant air. One that will is Dyakia hendersonianium. Most need some air exchange and breezes to inhibit rot and mold. Algae is another thing to combat with orchids due to the high levels of nitrogen and light. An orchidarium usually enjoys some air exchange, constant air movement - often enough to blow the plants about, and high humidity (sometimes over 90%) I have no problem growing nearly any Angraecoid and also grow several Dendrobiums that need high light. I also tried a Tolumnia (the question above) which rotted. In answer to the Tolumnia, I would grow it bare root and out of the misting but exposed to the fan. I plan to try one again under these conditions. Tolumnias will grow and flower under t5 florescents just fine, but roots have to dry off at night.
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My comments on Toumnia is entirely limited to its being considered for a terrarium for which we run an exclusive thread. What we can grow in an orchidarium is a different subject altogether. You do have many attractive showy ground orchids like Anoectochilus, Goodyera, Macodes, and Hamaera which are also known as jewel orchids that do well in breeze-exclusive terrarium containers. I also observe that most of other subscribers to the thread agree about the unsuitability of Tolumnia for a terrarium due to its xerophytic form of growth.