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Oncidium Orchids
Are a very large genus which grow
naturally throughout the tropical zones of the
American Continent and Caribbean
Often referred to as Dancing Lady Orchids,
because of the similarity to some of their
flowers to a Latin American dancer.
see books on oncidium growing priced in UK
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ONCIDIUMS
These orchids can be varied in their cultural
requirements, the hybrids are tolerant of wide
ranges in temperature, and broadly speaking do
best in an intermediate environment.
There are many varieties however spread
throughout the world, and cultural requirements
differ widely amongst the species, hence the
following is given as a general rule for most
hybrids.
Temperature and Humidity
Minimum night temperatures of 10 -15 C,
depending on the plants' origin, are needed, but
growth in summer is rapid at temperatures up to
26 C. A humid atmosphere, propelled by a fan is
beneficial.
Light In greenhouses, the normal maximum is
40/50% of full daylight or 1000-2500 foot
candles.
In hot weather shade sufficiently to ensure that
the leaves are cool to the touch.
If you are growing in the home give a bright
situation but not direct sunlight, behind a net
curtain, from April to September.
These also make good conservatory plants as long
as summer shade and good air movement can be
provided.
Watering and Fertilising
From March to September the compost should never
be allowed to dry out completely. Water twice
weekly and fertilise fortnightly with a
recommended orchid fertiliser. From October to
February, no fertiliser is needed, but water the
plants when the compost appears dried out. It is
better to underwater as the plants can stand
neglect more than over watering!
Compost and potting
A medium bark mix will do well with added
polystyrene spheres or perlite to keep it open.
Chopped sphagnum helps retain humidity and some
charcoal keeps it 'sweet'. New compost will keep
the plant growing for two to three years before
it turns acid and the plant needs repotting.
The best time to repot is when the new roots are
just beginning to appear at the new shoot's
base.
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