Orchid doctor

LIGHT, NATURAL: Requirements

Culture Orchid Doctor

by Robert M. Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin about 3 years ago.

Article Blog   Article Index
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. A64-145

Some 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)-30

Some genera prefer shade: Anoectochilus, Gongora, Masdevallia, Paphiopedilum, Pleurothallis, Polyrrhiza, Stanhopea, Stelis, Fitch- All about orchids.(1981)-30

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 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. 20180723 201240 James Bixler started topic Eulophia andamanenis in category General Discussion
  2. Jackie Hartter asked question Oncidium cheirophorum in category General Discussion
  3. 20180723 201240 James Bixler asked question Another blooming "Unknown" in category Beginners
  4. John Small asked question Fungal attack in category General Discussion
  5. Picture 1 Michael Pye asked question OrchidWiz in category OrchidWiz

New Comments

  1. Image Carol Holdren commented on member plant Lc. Canariensis by Steven Underwood
  2. Jean-Pierre ECOFFEY commented on topic "Eulophia andamanenis" by James Bixler
  3. Bio Alex Maximiano commented on member plant Paph. Prime Child by Jeanne M Uzar
  4. Rainer Birthelmer commented on member plant Spe. stumpflei by Rainer Birthelmer
  5. Rainer Birthelmer commented on member plant Pths. stumpflei by Rainer Birthelmer
  6. Rainer Birthelmer commented on member plant Muscarella. stumpflei by Rainer Birthelmer
  7. Bio Alex Maximiano commented on member plant C. Chyong Guu Swan var. Ruby Lip by Mary Lane
  8. Bio Alex Maximiano commented on topic "Oncidium cheirophorum" by Jackie Hartter
  9. 92f7c225 2490 4d3b 822c 2f4b8f30d6b8 Mary Lane commented on member plant V. denisoniana var. Orange form by Mary Lane
  10. Bio Alex Maximiano commented on member plant Rlc. Green Dragoon 'Mendenhall' by Jeanne M Uzar