Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000306
11/12/99
Cattleya Orchid
Type: house plant
Comments: Cattleyas are epiphytes so are usually grown in
chopped fir bark. Plants grown in pots smaller than 3
inches are potted in fine bark, that is 1/4 to 1/8 inch
in diameter. Plants in 4-inch pots or larger are potted
in medium bark, that is 1/4 to 1/2 inch in diameter. Do
not expose cattleya to direct summer sun. Cattleya gives
clues as to whether the light exposure is adequate. Dark
green, lush, or soft new growths indicate the plant isn't
getting enough light. Yellow leaves are an indication of
too much light. The leaves should be medium green and
leathery, rather than soft. Drench the pot with water
when the potting medium is dry. Potting in fir bark makes
fertilizing an important cultural practice. Several types
of fertilizer may be used and many orchid growers offer
specially formulated orchid fertilizer. Cattleya needs
fresh air. Do not subject the plant to stuffy, stagnant
air to maintain high humidity. Plants receiving proper
care do not require high humidity unless high temperatures
are maintained. Ideal temperatures are 65 to 70 degrees
during the day and 60 degrees at night. Avoid sudden
temperature changes.
Repot when the new growths extend beyond the edge of
the pot or when the potting media has decomposed. Repot
after the rest period, when new growths appear. Prune off
decayed roots before placing the plant in the new pot.
Propagation: Division is the primary propagation method.
Each division should have 4 pseudobulbs or mature leaves.
Cut through the rhizome with sharp pruners or a sharp
knife. The new pot should be large enough to allow for 2
or 3 new growths. Once the plant is in place, add the
bark and firm it down. Reduce the light exposure and
watering until the plant is established.
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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