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ODONTOGLOSSUM CULTURE

Odontoglossum orchids are native to the New World Tropics growing in altitudes of 4,000 to 5,000 feet where cool temperatures prevail year round. In their native habitat they most often grow in moss along the edge of ravines where the cool mist bathes them every morning and evening. They produce spectacular, brilliantly colored flowers on arching sprays. The culture of Odontonias, Odontiodas and Vuylstekearas is very similar.

Light

2,000 to 3,500 foot-candles or approximately 60 % shade.


Temperature

Daytime temperatures range from 60 to 80 degrees F. Night temperatures may range from 50 to 58 degrees F. Short periods of higher temperatures can be tolerated if humidity is high and constant air movement is present.

Media

Any media that is “open” with an air filled porosity of 40% and is resistant to break down is ideal. We use Redwood bark “wool” exclusively with excellent results. Coconut fiber is very close to the Redwood. Sphagnum moss, fir bark, or peat and perlite can also be used but must be monitored carefully for signs of breakdown of the mix.

Water

Moist but not wet as with many species of epiphytic orchids. Do not allow the plants to become completely dry before watering.

Fertilizer

We have tried many combinations of macro and micro elements and have concluded that a balanced 20-20-20 commercial water soluble fertilizer works just fine. Andy Easton recently stated that adequate light and space for each plant is far more important than any of the multitude of “specialized’ fertilizers and we agree.

Humidity

During warm, dry weather misting 2 or 3 times per day is most beneficial.


Potting

Repotting or dividing the plants is best performed in the fall or early spring.
The mix must be open yet with good water retention.


Pesticides

Metaldehyde for slugs and snails (they love Odontoglossum flowers), Diazinon for sucking insects such as thrips and aphids. Physan for algae and fungi.

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Fax: 707.725.6985
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