Panel session having M. Peter Furniss as moderator and with the participation
of Donna Craig, Albert Falcinelli, John Doherty, S. Yamamoto, C. Rougenant
and Potting Media in Orchid Cultivation
By Donna CRAIG
Although orchids in nature grow on trees, rocks and mulch, enjoying
rainwater and the natural fertilizers found in plant, insect and animal
litter, this is usually not the case in cultivation. We cram them in
pots and serve them water that is all too often of high salt content.
Many growers collect rainwater, forgetting that in “civilization”
our air, and, consequently our rainwater, is tainted with household
and industrial pollutants of unknown origin and content.
Fortunately, it is not difficult to offset these drawbacks through informed
use of potting media, fertilizers and water adjusted to meet the nutritional
needs of our plants. We shall be examining various potting materials
and, perhaps most importantly, the quality of water, that should produce
optimum health in our orchids without prohibitive expense.
We come from various parts of the world, undoubtedly employing different
products and methods. It is our hope that this open discussion will
inspire and inform all of us as we share our successes and failures
in orchid culture.
Craig is a past President of American Orchid Society, Inc. Currently
serving on AOS Finance Committee and as a Trustee of the World Orchid
Conference Trust. She has attended nine WOCs.
of ambient temperature and compost temperature on vital functions of
By Albert Falcinelli
The ambient temperature of the greenhouse has an action on respiration,
photosynthesis, sap circulation, evapotranspiration, multiplication
and differenciation of cells in aerial organs. Compost temperature stimulate
germiatnion, has an influence on root absorption, respiration and growth
of underground organs.
Falcinelli is an orchid producer specialized in Paphiopedilum.
and their Cultivation
By John Doherty
Cyopripedium native to the temperate zones of North America can
indeed be successfully propagated from seed to flower under artificial
conditions. There are a number of suitable in vitro media availabe.
Certain species need dry, some wet. Lilght - the brighter the better,
depending on species. Taller, luisher growth in shede, shorter yet more
proliferative growth in bright sun. Vernalization - winter greeze essential,
however pots need to be uried in garden, or maintained in could house
studies Plant Biotechnology at University of Guelph, Canada, and also
became a judge of the American Orchid Society. He currently owns and
operates Zephyrus Orchids, in Windsor, Canada.
method of sowing orchid seeds in kitchen or anywhere else
By Shin'ichi Yamamoto
My method for sowing orchids seed without any special preparation is
using disinfectant directly into medium itself.
Extremely simple and useful, one can sow orchids in the kitchen, on
the table and even outdoor.
It works very well for both of liquid and agar medium. Bletilla,
Neofinetia, Paphiopedilum and Dendrobium are examined
and germinated well.
To keep an orchid culture
in good health
By Claudie Roguenant
The reason of failures in amateur orchid cultivations is the consequence
of the ignorance of natural habitats, the bad choice of plants, the
lack of care, the accumulation of too much plants. The repercussions
are: appearance of illnees: mushroms, bacteria and virus. How to act
by hand, by chemically? Which chemicals are permitted and banned. The
side effects on plants. The preventive treatments.
Roguenant is author of many books on orchid cultivation.
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