5 Best Orchids for Closed Terrariums
Building an orchid terrarium is amazingly fun. When you recreate a mini-habitat that simulates where orchids would live naturally, you're rewarded with some of the most beautiful terrariums that exists: orchid terrariums.
Closed terrariums simulate a rainforest in terms of humidity, since the trapped air enters a repetitive cycle of condensation and evaporation. Orchids happen to love humidity. The natural consequence of loving orchids and loving terrariums is the creation of orchid terrariums.
"DSC_1724" by Luis Embalo is licensed under CC BY-ND 2.0.
Building a terrarium that won’t die in a couple months is accomplished by grouping plants with similar growing conditions together.
Don’t think that you’ll grab a bunch of plants laying around, throw them into a glass vase and, voila, you’re done.
Researching your plants to make sure that they'll live well together is half the fun. Fun?? Yes! When you start elaborating a list of plants whose growing conditions are similar, you design a "natural landscape" that permits all them to live together.
What orchids are most suited for terrariums? Look for orchids that won’t grow more than the size or your open palm—miniature orchids. Out of that list, search for orchids that like high humidity if you are using a closed terrarium, and lower humidity if using an open terrarium.
The most common miniatures are the same as the most popular orchids bought and sold in greenhouses. This might be because of popular demand, but don’t focus on only these.
Some less common orchids are varieties that only come in miniatures, and that's what we’ll focus on in this article. Before you go out and buy orchids off this list, let’s take a look and learn a little more about each one and how to care for it.
Most Common Miniature Orchids
Best Miniature Orchids for Closed Terrariums
1. Masdevallia Orchids
Masdevallia orchids love high humidity, from 80 to 100%. This is why they're the perfect species to grow in a closed terrarium.
They don’t like much light, being on the low-light category if 1000 to 1200 foot candles. This means that if you get a Masdevallia in your terrarium, don’t place the terrarium in direct sun, like on a window sill.
It needs bright light, but the sun rays that hit the glass directly will heat the air inside of the glass and become a magnifying glass, burning the leaves.
Masdevallias prefer to be planted in only sphagnum and perlite, but not bark.
This is because they don’t have pseudobulbs and can’t hold water, so they’ll dry out more often.
The sphagnum will not allow humidity to totally evaporate, so their roots will be happier.
Bark is too hard of a structure for their fine roots.
"Masdevallia ?" by Anna Norris is licensed under CC BY-ND 2.0
2. Dracula Orchids
Dracula orchids are much like Masdevallias in their care. They are so similar that it was only in 1978 that Draculas separated from the Masdevallia species and got their own distinct classification.
Curiously enough, the name Dracula wasn’t from the horror movie or classic literature, but from the latin word “dragon”. Two prolongations on each side of the flower resemble the side beards that are usually drawn on Chinese dragon pictures. A lot of the orchids within the 90 categorized in the Dracula species have black dots which resemble eyes. Some of these Draculas are even called monkey orchids for that reason.
"Dracula vampira full" by Orchid Junkie is licensed under CC BY-SA 2.0
As to their care, the same light and humidity requirements apply, but one thing I didn’t mention was the temperature.
Draculas are more adept to cooler temperatures, so if you grow this one in your terrarium, definitely keep it away from direct sun.
By cooler temperatures, don’t let your Draculas reach over
68ºF (20º C)
in the day time. At night, drop the temperature in the room to 58º F (14º C). You might need to direct a cool-air fan directly at the glass to achieve this drop, but the main important thing is that the glass (and the air inside it) never gets too hot.
3. Lepanthe Orchid
A good reason to keep a Lepanthes orchid is not only for its flower, the leaves on this orchid are fascinating. The flowers are actually quite tiny, (0.3 inches or 8mm) and if there was a “mini-mini-mini” classification, these would win the prize.
They only stay in bloom for an extremely short time, one flower at a time, but in succession. One grows, dies, then another blooms. They also don’t have a resting period or go into dormancy.
With extremely colorful blossoms, usually are bright red or multi-colored, Lepanthes develop a visual contrast from the dark green-veined leaf.
When placing Lepanthes in your terrarium, keep it towards the back or under a log. Why? These prefer full shade, more so than the Masdevalias and the Draculas. Since their foliage is their main attraction, with highly-developed and intricate patterns, these make a perfect “filler” plant. They can tolerate up to 2100 foot candles, but thrive in less.
Lepanthes are high watering plants, just like the other two mentioned above.
They are most commonly found planted in sphagnum moss and perlite because of their high humidity requirements (60 to 80% humidity).
As for temperatures, Lepanthes do well in cooler to warm temperatures, and can tolerate higher temperatures than the Draculas do.
As for fertilizer, don’t use ¼ of the recommended does: use 1/8. This goes for all the miniature orchids that are listed in this article.
"Lepanthes magnifica" by J. Sebastian Moreno is licensed under CC BY-ND 2.0
4. Platystele Orchids
Platystele orchids, (with 95 catalogued species in the genus) are good for the foliage, since their flowers are extremely tiny: 0.1 inches (2.5mm). The good part is that they grow in bundles, unlike the Lepanthes, which is a single bloom.
"Platystele sp" by luis perez is licensed under CC BY 2.0
These cool to warm growing orchids thrive in temperatures around
60 to 90°F (15 to 33° C)
so they do well indoors.
The ideal temperature is 80º F (26º C) during the day, dropping to
64º F (17º C) at night.
5. Tolumnia Orchids
My favorites!!! Tolumnias are “mini-oncidiums” (that’s what I call them.) In fact, they were part of the Oncidium genus for years, until they became their separate genus in 1986.
For beautiful flowers in your terrarium, try these orchids, because once the flower and blossom into gorgeous mini-oncidiums, they will bloom again. You shouldn’t be messing around in the terrarium anyway, but resist the temptation to cut back the flower spike after it blooms. If it’s well-nourished, you can expect two blooms, one right after another.
Of all the orchids mentioned above, Tolumnias can be grown in less humidity,
50 to 70%.
So if none of the mini-orchids hit that soft-spot in your heart, try tolumnias with other less humid orchids, like Phaalenopsis. Tolumnias and Phals grow great together, since their conditions are extremely similar.
"劍葉文心蘭 Tolumnia Golden 'Luis Hapsburg' [香港花展 Hong Kong Flower Show]" by 阿橋花譜 KHQ Flower Guide is licensed under CC BY-SA 2.0
Tolumnias prefer to be mounted on bark than potted in sphagnum moss, so if you are planning on using a tree or log, this is the perfect plant for that. Mount it higher up, toward the top of the terrarium, so the flowers can spill down.
Tolumnias will be the biggest of the plants on this list, and can be potted into 3 to 4 inch pots (7 to 10 cm). So when transplanting them into your terrarium, keep in mind they do grow.
These are a good suggestion for starters, and can be found online to buy at orchid stores. If you want to try others, take a look at:
Corybas (or spider orchids),
Gastrochilus (which look like tiny Phaalenopsis orchids),
Cystorchis Variegata (which is another larger type of Jewel Orchid),
Goodyera (rattlesnake plantain),
Anoectochilus (also good for foliage with intricate leaf patterns),
and Stellis argentata.
No matter what orchids you use in your terrarium, be sure to do proper research on it, and buy other orchids that go into that same description of light, humidity, watering, fertilizer and other similar conditions.
It’s better to have a smaller terrarium that thrives, than a larger on which is doomed to death.
If you want to see more pictures of these orchids, head over to my Pinterest page,
where I have more than 200+ pictures of orchids separated by categories. There you'll also find more pictures of terrariums, which aren't quite as complex as the ones here.
I hope this list gives you a good starting point in gathering the right orchids for your closed terrarium. If you have any questions or comments, please leave them in the box below.