LIGHT, NATURAL: Sunlight Relative to Sun Hdat

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 3 years ago.

Article Blog   Article Index
For a chart in foot candles of light related to BTU per square feet per hour, refer to A68-470
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: Poor Conditions in Early Spring 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 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: 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. Kate McMillan started topic Horticultural Charcoal vs Activated Charcoal in category General Discussion
  2. Susan smith asked question Vanda Samsri Gory in category General Discussion
  3. Edward Zapata asked question Sale and trade in category General Discussion
  4. Jackie Hartter asked question Cymbidiums not blooming in category General Discussion
  5. Robert Ferguson asked question Neomorrea in category General Discussion

New Comments

  1. Carol Holdren commented on article "Hawaiian Hilo Orchid Judging is Back in Business on the Big Island!" by Glenn Barfield
  2. Carol Holdren commented on member plant Phal. Yin's Black Eagle var. Green by Terry Moore
  3. Carol Holdren commented on member plant Fdk. After Dark 'Black Pearl' by Renee Hawes
  4. Alex Maximiano commented on member plant Oncsa. Sweet Sugar var. Lemon Drop by Mary Lane
  5. Robert H. Findlay commented on member plant Phrag. Sergeant Eric by Robert H. Findlay
  6. Kim Kelley commented on member plant Mex. ghiesbrechtiana by Kim Kelley
  7. Lauren Hutchison commented on article "Orchids and Freaky Weather" by Anu Dharmani
  8. Robert H. Findlay commented on member plant Mps. Hajime Ono '#5' by Robert H. Findlay
  9. Robert Ferguson commented on member plant Bc. Groganiae 'Hutchinson' by Jeanne M Uzar
  10. Sharie Heckaman commented on member plant C. labiata var. Rubra by Marli Guarino
  11. Sharie Heckaman commented on member plant Suara. Rick Beverly 'Valentine's Gift' by George Su
  12. George Su commented on topic "New Intergeneric Orchids" by George Su
  13. Marli Guarino commented on member plant Monnierara Millenium Magic var. Witchcraft by Marli Guarino
  14. Tien Pham commented on topic "Cymbidiums not blooming" by Jackie Hartter
  15. Marli Guarino commented on member plant C. Stradivarius 'Eclipse' by Carlos Bermudez
  16. Carmen Betancourt commented on member plant Den. Adora Nishii by Terry Moore
  17. John Weland commented on member plant Mcp. Tibiana by Blanca Acosta
  18. Carol Holdren commented on member plant Angcm. viguieri by Terry Moore
  19. Carol Holdren commented on topic "Vanda Samsri Gory" by Susan smith
  20. Gilda Gómez commented on member plant C. purpurata var. (flammea x sanguinea) by Carol Holdren