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Old 30-06-2004, 05:07 PM
K Barrett
 
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Default meaning of Light

You are looking for bright indirect light. Similar to what african violets
bloom in. But it *does* depend on what types of orchids you are growing.
Direct light on leaves will burn them. If you have to err be on the side
of morning light rather than hotter afternoon light (when the plant's somata
are closed) allowing more heat buildup. But this heat buildup can be
diffused by increasing cooling with fans, but then the plant dries out....
so, you see what a ball of wax you can open when you don't have a proper
site in the first place.

Very generally, you are looking for eastern and southern exposures although
orchids can do OK in the heat from a western and southern exposure too.
Northern usually is out unless there is appreciable bounce from a structure
next door.

In general phalaenopsis and paphiopedilums will tolerate less light (more
shade) while cattleyas and oncidium will require more. Not only more
intense light but also more hours of light at that intensity.

There is a good discussion of light and how to judge the proper intensity
and duration in the Ortho book 'All About Growing Orchids'. If you search
around online you should be able to find a site with instructions on using
your SLR camera as a light meter so you can judge how much light your
location has. I was never able to make that work, but that's not saying
much.

So where does this leave you? You are looking for a bright room in your
house. Something an interior designer would say 'Oh such a nice room, and
good light' about.

K Barrett

"Holy Smoke" wrote in message
...
I am new to orchids and have been doing some reading. One of the

neccessary
requirements for orchid growth is light. What does the word light here

mean?
Does it mean that the plant must be in the sun light or just a place

bright
enough (though in a shade area) for those plants that require moderate
light?
TIA