How to Choose the Right Orchid
Choosing the right orchid for your home requires some consideration. Few beginning orchid growers take the time to consider their environment before they buy, but it's easy end up bringing home a gorgeous orchid that's completely wrong for your home. Before you bring home an orchid, you need to consider the average daytime and nighttime temperatures in summer and winter where you live, and the amount of light the orchid will get in your home.
When orchid publications refer to temperature preferences, they always mean the evening temperature. The daytime temperature is usually about 15 degrees F (9.5 C) higher than the evening temperature. To determine your home's high and low temperatures indoors, get a maximum/minimum thermometer that records this information and place it in your growing area.
The following table lists some of the most common types of orchids by temperature requirements. Notice that some orchids are adaptable enough to fit into more than one temperature range.
Orchid Temperature Preferences
| Temperature (Nighttime Minimum) |
Genus |
| Cool 45 to 55 degrees F (7.2 to 12.8 degrees centigrade) |
Cymbidium |
|
|
Dendrobium |
|
|
Odontoglossum |
| Cool 45 to 55 degrees F (7.2 to 12.8 degrees C) to Intermediate
55 to 60 degrees F (12.8 to15.6 degrees C) |
Cymbidium |
|
|
Dendrobium |
|
|
Encyclia |
|
|
Masdevallia |
|
|
Miltoniopsis |
|
|
Zygopetalum |
| Intermediate 55 to 60 degrees F (12.8 to 15.6 degrees C) |
Aerangis |
|
|
Cattleya and hybrids |
|
|
Cymbidium |
|
|
Dendrobium |
|
|
Encyclia |
|
|
Epidendrum |
|
|
Laelia |
|
|
Maxillaria |
|
|
Miltonia |
|
|
Oncidium |
|
|
Paphiopedilum |
|
|
Phragmipedium |
|
|
Vanda |
|
|
Zygopetalum |
| Intermediate 55 to 60 degrees F (12.8 to 15.6 degrees C) to
Warm 65 F (18.3 C or higher) |
Aerangis |
|
|
Amesiella |
| . |
Angraecum |
| . |
Ascofinetia |
| . |
Brassavola |
| . |
Cattleya |
| . |
Dendrobium |
| . |
Encyclia |
| . |
Epidendrum |
| . |
Neofinetia |
| . |
Neostylis |
| . |
Oncidium |
| . |
Rhynchostylis |
| . |
Vanda |
|
|
Vascostylis |
| Warm 65 degrees F (18.3 degrees C) or higher |
Angraecum |
|
|
Phalaenopsis |
|
|
Vanda |
Just as important as temperature is the amount of light your orchid will get. Orchids that thrive in high light need several hours of direct sunlight (preferably in the morning to early afternoon), while those that thrive in lower light will perform with less direct and more diffused light in a windowsill or under lights.

Perform this shadow test to measure light intensity.
The following orchids require a bright greenhouse, a very bright south-facing window, or very-high-output (VHO) fluorescent lamps (which require specialized ballasts to operate) or metal halide lamps:
The following orchids need a shaded greenhouse, an east-facing window, or a four-tube 40-watt florescent light fixture:
Amesiella
Ascocenda
Ascocentrum
Ascofinetia
Brassavola
Brassia
Cattleya and hybrids
Some varieties of Cymbidium
Some varieties of Dendrobium
Epidendrum
Laelia
Leptotes
Masdevallia
Miltonia
Miltoniopsis
Neofinetia
Neostylis
Odontoglossum
Oncidium
Paphiopedilum (strap-leaf multiflorals)
Phragmipedium
Rhynchostylis
Zygopetalum
The following orchids do well with a low level of light, easily attainable with two 40-watt florescent lamps or on an east-facing windowsill:
In addition to considering temperature and light when growing orchids, consider these questions:
Does the growing area have moist (humid) air, or is the air very dry? If it is already humid (50 percent or greater), it's perfect. If not, your orchids will be happier with moister air.
How much space do you have to grow orchids? If you have plenty of head room, you can grow some of the taller orchids, like cane dendrobiums and full-size cattleyas. If space is at a premium, search out very compact or miniature growers.
When do you want your orchids to bloom? Spring, summer, fall, or winter? In the evening or during the day? Armed with this information, you can pick those orchids that will be in bloom in the season and time of day of your choice.
Do you have air circulation in the growing area? Most homes have adequate air circulation, but if your orchids are going to be located in the basement or some other spot where the air is stagnant, you'll want to consider a fan of some type to provide them with fresh air.

Gardening Glossary
annuals
Plants that complete their entire life cycle within one growing season. The plant germinates from seed, grows and blooms, and then produces seed and dies.

Gardening Glossary
biennials
A plant that take two growing seasons to complete its life cycle. It germinates and grows leaves and stems in the first year; produces flowers and fruit (seed) in the second, and then dies.

Gardening Glossary
bolt
When a plant flowers or produces seed prematurely.

Gardening Glossary
cold frame
A wooden or concrete block box in which you can grow plants or hold dormant during the cold winter months.

Gardening Glossary
cole crops
A family of vegetables, including broccoli, cabbage, cauliflower, kale, and Brussels sprouts. They thrive in cooler weather.

Gardening Glossary
complete fertilizer
Any fertilizer that contains all three of the primary nutrients, N-P-K (nitrogen, phosphorus, potassium). Phrase is based on regulations governing the fertilizer industry. Does not mean that the fertilizer literally contains everything a plant needs to thrive.

Gardening Glossary
deadheading
The practice of pinching or cutting off spent flowers

Gardening Glossary
evaporative-pad humidifier
A humidifier in which fans blow across a moisture-laden pad that sits in a reservoir of water.

Gardening Glossary
harden off
The process of acclimating plants grown indoors gradually to the brighter light and cooler temperatures of the outside world.

Gardening Glossary
hardiness
The ability of a plant to survive is called its hardiness.

Gardening Glossary
humus
A stable end product of organic-matter decomposition that's believed to increase microbial activity in soil, improve soil structure, and enhance the root development of plants.

Gardening Glossary
Bacillus thuringiensis Bt
An effective bacteria that attacks only the larvae of caterpillar family insects. It is safe to other insects, animals, and humans.

Gardening Glossary
macronutrients
Mineral nutrients that plants need in the largest quantities: nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur.

Gardening Glossary
mulch
Organic or inorganic material placed over the surface of soil, usually directly over the root zone of growing plants. Used to conserve moisture, kill weed seedlings, modify soil temperature, provide attractive covering to garden beds.

Gardening Glossary
organic matter
Once-living stuff like compost, sawdust, animal manure, ground bark, grass clippings, and leaf mold (composted tree leaves). Used to enrich soil and improve soil texture.

Gardening Glossary
perennials
Any plant with a life cycle of three or more years. Herbaceous (non-woody) perennials include flowering plants and herbs, mainly. Woody perennials include trees and shrubs. Longevity depends on the plant and growing conditions.

Gardening Glossary
pH
The measure of soil's acidity. Soil with low pH means it's too acidic; soil with high pH means it's alkaline. Most plants grow best in soil with a pH value between 6.5 and 7.2. Neutral soils measure 7.

Gardening Glossary
photosynthesis
The process through which plants take nutrients from the air and from the water in the soil to produce sugars that fuels the plant's growth.

Gardening Glossary
primary nutrients
Nitrogen, phosphorous, and potassium are the three nutrients plants need in the largest quantities.

Gardening Glossary
root crops
Plants with edible underground roots such as onions, carrots, beets, potatoes, turnips. Most root crops are cold-weather crops.

Gardening Glossary
self-blanching
A type of cauliflower with leaves that naturally curl over the head and exclude light. Requires cool temperatures for leaves to curl effectively.

Gardening Glossary
sets
Small onion bulbs, about 1/2-inch wide, that were started from seed the previous year. Grow onion sets with the pointy end up.

Gardening Glossary
side-dressing
The act of adding a small amount of fertilizer around or "on the side" of plants after they're growing.

Gardening Glossary
succession planting
Planting small, 2-to-4-foot patches of plants every two weeks throughout the growing season so that you can harvest a crop over an extended period of time.

Gardening Glossary
thinning
The act of cutting the least robust seedlings in your garden to give the healthier plants more room to grow.

Gardening Glossary
vining crops
Crops that grow on vines, such as cucumbers, melons, pumpkins, and winter squash. They usually require support (staking, trellising, etc.) to keep them off the ground.