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 4 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

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  1. John Small asked question Paper Wasp? in category General Discussion
  2. Sharie Heckaman started topic Photos of plants in category General Discussion
  3. Roberto Lizama started topic Orchid identification in category General Discussion
  4. Roberto Lizama asked question Help to idenficate this orchid in category General Discussion
  5. William Gorski asked question Dendrobium Identification in category General Discussion

New Comments

  1. Mary Lane commented on member plant Fdk. After Dark 'SVO Black Pearl FCC/AOS; CCE/AOS' by William Gorski
  2. John Small commented on topic "Paper Wasp?" by John Small
  3. Lauren Hutchison commented on topic "Help to idenficate this orchid" by Roberto Lizama
  4. Carol Holdren commented on member plant Phal. Timothy Christopher by Vickie Seibert
  5. Carol Holdren commented on topic "Photos of plants " by Sharie Heckaman
  6. Carol Holdren commented on member plant C. Ronald Fonseca var. Compact 'SVO' by Vickie Seibert
  7. Roberto Lizama commented on member plant Ntl. bicolor by Roberto Lizama
  8. Carol Holdren commented on member plant Gra. stapeliiflora var. Waki by Melvin Waki
  9. Vickie Seibert commented on member plant Phal. Anna-Larati Soekardi 'Wilson' by Vickie Seibert
  10. Carol Holdren commented on member plant Rrm. Spunky by Melvin Waki
  11. Charles Vella commented on topic "Orchid list Cold/Warm" by Charles Vella
  12. Sandi Block-Brezner commented on topic "Brassocattleya hybrid?" by Sandi Block-Brezner
  13. Robert H. Findlay commented on topic "looking for info about an unregistered cattleya" by bob lewis
  14. james Hu commented on orchid Den. vannouhuysii
  15. Chase Hubbard commented on member plant Hknsa. Sogo Doll by Tom Kuligowski
  16. Colin Campbell commented on topic "Can anyone identify this orchid?" by Jan E Teitsworth
  17. Carol Holdren commented on member plant Lc. Memory of PienPien Wei by Robert Rand
  18. Robert Rand commented on member plant Bc. Yellow Bird by John Small
  19. Sharie Heckaman commented on member plant Btcm. Hwuluduen Chameleon by Diana Sammy
  20. Sharie Heckaman commented on member plant (C. Leoloddiglossa var. coerulea 'SVO Baby Blue' x C.Interglossa aquinii var. coerulea 'SVO') 'SVO' by Joshua J Peterson