Orchid doctor

DAYS, SHORT: Effects

Culture Orchid Doctor

by Robert M. Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 3 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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More The Orchid Doctor Articles under the Heading Day Length

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. Karen Kaye asked question details for care. Food, fan location etc in category General Discussion
  2. 2016 11 03 Jeanne M Uzar asked question Looking for Plant Identification in category General Discussion
  3. John Small asked question One And The Same? in category General Discussion
  4. Ashley Matherne asked question orchid search in category Cattleya Alliance
  5. Elizabeth Padilla asked question Help with ID, Please & Than You! in category Dendrobiums

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  2. 2016 11 03 Jeanne M Uzar commented on member plant Bulb. Crownpoint by Jeanne M Uzar
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  4. Image Carol Holdren commented on member plant Rth. Lemon Drop by Christopher Dolan
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  7. Edward Zapata commented on member plant C. purpurata var. Flamea x sanguinea by Carol Holdren
  8. Moises Viana commented on topic " I need help identifying this orchid" by Moises Viana
  9. Image Carol Holdren commented on topic "I need help identifying this plant" by Gabriel Simões
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