LIGHT, NATURAL: Transmission Through Plastic Films and Fiberglass Panels

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 8 years ago.

Article Blog   Article Index
Data on 12 different greenhouse coverings; refer to A64-639+ see also Days,Short; Foot-candles reading; Photoperiodism; Phototropism; Reflective materials
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: 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

New Topics

  1. Danielle Carbonneau asked question phalaenopsis, dendrochum and Odontoglossum in category Phalaenopsis
  2. Nicholas Filannino asked question Phalaenopsis William Kistler? in category General Discussion
  3. Mark Farran asked question How to open and read articles listed in category General Discussion
  4. Juliann Eckhard started topic Cattleya little susie in category Cattleya Alliance
  5. Shannon Gardea asked question NELLY ISLER in category General Discussion
Ask a Question

Start a Topic

New Comments

  1. Louis Wilson commented on member plant E. alata f. alba by Louis Wilson
  2. Julie Ellner commented on member plant Phal. amabilis var. formosanum by Vickie Seibert
  3. Julie Ellner commented on member plant Rlc. Green Dragoon 'Mendenhall' by Jeanne Uzar Hudson
  4. Danielle Carbonneau commented on member plant Ons. Catatante 'Los Roble' by Henry Shaw
  5. Barry J Silver commented on orchid Lyon. SunCoast Pink Passion
  6. Carol Holdren commented on topic "Phalaenopsis William Kistler?" by Nicholas Filannino
  7. Carol Holdren commented on orchid Colm. Eric Gabriel Heines
  8. Carol Holdren commented on topic "Cattleya little susie" by Juliann Eckhard
  9. Carol Holdren commented on member plant Bc. Morning Glory by Chris Siolo
  10. R .Benson commented on member plant Kir. New Hybrid (Fred Clarke) SVO9831 by R .Benson
  11. Carol Holdren commented on topic "Blooming Stenglottis Venus “jamboree “" by John Urey
  12. Jeanne Uzar Hudson commented on member plant Lc. Canhamiana var. coerulea 'Cobalt' by Jeanne Uzar Hudson
  13. Jeanne Uzar Hudson commented on member plant Sns. gemmata by Jeanne Uzar Hudson
  14. Stefan Neher commented on topic "Orchid roots .com site?" by Mary Lane
  15. Kevin Barry commented on member plant Bul. Tammie Sue Pernas by Tony Pernas
  16. Linda Hartman commented on member plant Ctt. Final Blue by Linda Hartman
  17. Kevin Bergeson commented on member plant Paph. rothschildianum by Kevin Bergeson
  18. Carol Holdren commented on topic "recently purchased orchid shows unstoppable roots " by David George
  19. Michael Makio commented on orchid V. Beatrice Makio
  20. Carol Holdren commented on topic "shorter stem with less vigorous blooms" by katherine mott