DAYS, SHORT: Effects

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin about 5 years ago.

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Cloudy weather can cause short days effect; stimulates flowering; weak light causes shortage of carbohydrates. A77- 36
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Day Length Comments
DAY LENGTH: Increased by Artificial Light Cattleyas may not flower with too much light, under lights and with kitchen lights on full. A86-1031Fall flowering cattleyas most respond to light; increase the day length by turning on lights for four hours from 10 p.m. to 2 a.m. each night; several weeks later after lights are turned off the plants should begin to flower; start lights in mid-July to delay fall-flowering cattleyas into winter. F74-165 0
DAY LENGTH: Response of Plants Cattleya warscewiczii does not respond to day-length; if a hybrid with it in its genes, flowers in early summer and the sheath is green and fleshy, it will not respond to photoperiod control. A86-815 0
DAYS, SHORT: How Many Required to Set Cattleya Buds Sometimes as few as five days; some crippling of flowers will show if too-long days follow the bud set period. A70-798 0

New Topics

  1. Fritz wilke asked question What kind of orchid is this? in category General Discussion
  2. Robert Stagner asked question cattleya mossiae Willowbrook in category General Discussion
  3. Judith Pariseau asked question Paphiopedilum culture differences in category Paph Alliance
  4. Marc Lefkowitz asked question Bulbophyllum in category Bulbophyllums
  5. Tony Borowiecki asked question Can a Bealleara re-flower in category Oncidium Alliance

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