LIGHT, NATURAL: Poor Conditions in Early Spring

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 5 years ago.

Article Blog   Article Index
This causes growth changes in cymbidiums; April and May dullness retards growth appreciably for several years and may retard ripening and flowering for a year or more if the plants go out of phase. OR80-221; in culture. A81-640
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Light, Natural

Light, Natural Comments
LIGHT, NATURAL: And Epiphytes Requirements for optimum growth for high light and low light plants; theoretical; refer to A85-819 0
LIGHT, NATURAL: Characteristics And the reaction of different genera of plants to it outdoors and inside the greenhouse: vandas, cattleyas, phalaenopsis; on leaf burn; refer to AH86-97It consists of four P's: photosynthesis, in which water and carbon dioxide are brought together under light to form carbohydrates; photoperiodism, the relationship between day and night lengths; phototropism, the reaction of plants to the light source; and, phytochrome response, a blue pigment called phytochrome occurring in two forms, one producing optimum growth response, the other nullifying it. A66-910+; A72-243+ 0
LIGHT, NATURAL: Checking with a Light Meter After obtaining a reading, move the plants closer to or farther away from the source depending on requirements; at 1000fc, over 12 hours the exposure is 12,000fc.-hours per day; on a clear day in Florida garden plants take 150,000fc.-hours. AH86-99 0
LIGHT, NATURAL: For Cattleyas Young cattleyas can stand more light than mature plants, not less; no reason to shade them, except to watch the moisture content of small plants. A68-911 0
LIGHT, NATURAL: Intensity Plants respond to a scientifically balanced fertilizer if light is kept be low 2500 foot-candles or less for some genera during the hottest months. Au84-203 0
LIGHT, NATURAL: Morning Light Is Important The first light in the morning can be as strong as possible to start off the process of carbohydrate formation; light is much more intense at midday. AU79-37 0
LIGHT, NATURAL: Morning Light Preference Shown by Plants in Natural Habitat It is apparent when photographing plants on trees, they are located on the east side; in the greenhouse the best growing light is the morning light. A73-683; A73-781 0
LIGHT, NATURAL: Requirements A list of different varieties; the actual light requirements for species has hardly been determined; for other plants it has been done; for plants that grow best in full sun their leaves reach maximum photosynthesis at intensities well short of full sunlight such as 1,500 to 2,500fc.; consider the effect of shading, crowding and light reflection when trying to assess light requirements. A64-145Some genera need strong light: Ascocentrum, Brassavola, Dendrobium, Epidendrum radiatum, Encyclias, esp. E. cordigera, Laelia anceps, L. milleri, Oncidium species with thick leaves, Renanthera, Vanda. Fitch -- All about orchids.(j981)-30Some genera prefer shade: Anoectochilus, Gongora, Masdevallia, Paphiopedilum, Pleurothallis, Polyrrhiza, Stanhopea, Stelis, Fitch- All about orchids.(1981)-30 0
LIGHT, NATURAL: Requirements for Cattleyas An intensity of 2,000 to 3,000fc. is an excellent range; the higher the light the more cooling and ventilation required. A68-56 0
LIGHT, NATURAL: Requirements for Maximum Light For a review of excess or weak light effects and their results, refer to A67-468+; AH42+ 0
LIGHT, NATURAL: Sunlight Relative to Sun Hdat For a chart in foot candles of light related to BTU per square feet per hour, refer to A68-470 0
LIGHT, NATURAL: Transmission Through Plastic Films and Fiberglass Panels Data on 12 different greenhouse coverings; refer to A64-639+ see also Days,Short; Foot-candles reading; Photoperiodism; Phototropism; Reflective materials 0

New Topics

  1. Roberto Lizama asked question Help to ID in category General Discussion
  2. Roberto Lizama asked question Please help to ID in category Species
  3. Diana King asked question Compact DEN SUPERBUM ORCHID MINEATURE in category General Discussion
  4. Diana King asked question Brsdm GILDED URCHIN ONTARIO ORCHID in category Orchid Doctor
  5. Catherine Chance asked question Searching for Erycina echinata in category General Discussion

New Comments

  1. Carol Holdren commented on topic "Brsdm GILDED URCHIN ONTARIO ORCHID" by Diana King
  2. Carol Holdren commented on topic "Compact DEN SUPERBUM ORCHID MINEATURE " by Diana King
  3. Pam Lipscomb commented on member plant Blc. Oconee 'Mendenhall' by Jeanne M Uzar
  4. Carol Holdren commented on topic "Don't we meet in person in Kalamazoo, MI anymore?" by Conni Wireman
  5. Catherine Chance commented on topic "Searching for Erycina echinata " by Catherine Chance
  6. Carol Holdren commented on member plant Gom. Jiaho Queen 'Jiaho' by Robert Rand
  7. Pam Lipscomb commented on member plant Bsn. Maikai var. Louise by Sandi Block-Brezner
  8. Robert H. Findlay commented on member plant E. Rioclarense by Robert H. Findlay
  9. Susan LE commented on member plant QF Makani by Tanya Lam
  10. Pam Lipscomb commented on member plant Eny. Exotic Seashell by Steven Kirincich
  11. Pam Lipscomb commented on member plant Lc. Little Oliver by Steven Kirincich
  12. Susan LE commented on topic "Paph Harry Stage" by Key Stage
  13. Susan LE commented on scheduled event "Tamiami International Orchid Festival" by Miami Orchid Society
  14. Susan LE commented on article "Orchid Wiz - what will we do without you?" by Carol Holdren
  15. Susan LE commented on member plant Coel. rochussenii 'Waki' by Melvin Waki
  16. Susan LE commented on member plant Rlc. Beauty Girl by Blanca Acosta
  17. Mary Lane commented on member plant Den. lindleyi by Mary Lane
  18. António Almeida commented on article "Angraecum Culture with Semi-Hydroponic Techniques" by Tom Kuligowski
  19. Pam Lipscomb commented on member plant Blc. Walden's Glen by Jeanne M Uzar
  20. Pam Lipscomb commented on member plant Blc. Oconee 'Mendenhall' by Jeanne M Uzar