Category: Orchid Doctor

LIGHT, NATURAL: Morning Light Is Important

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 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 Read More

LIGHT, NATURAL: Morning Light Preference Shown by Plants in Natural Habitat

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 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 Read More

LIGHT, NATURAL: Poor Conditions in Early Spring

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 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.... Read More

LIGHT, NATURAL: Requirements

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 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 maxi... Read More

LIGHT, NATURAL: Requirements for Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago An intensity of 2,000 to 3,000fc. is an excellent range; the higher the light the more cooling and ventilation required. A68-56 Read More

LIGHT, NATURAL: Requirements for Maximum Light

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For a review of excess or weak light effects and their results, refer to A67-468+; AH42+ Read More

LIGHT, NATURAL: Sunlight Relative to Sun Hdat

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For a chart in foot candles of light related to BTU per square feet per hour, refer to A68-470 Read More

LIGHT, NATURAL: Transmission Through Plastic Films and Fiberglass Panels

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Data on 12 different greenhouse coverings; refer to A64-639+ see also Days,Short; Foot-candles reading; Photoperiodism; Phototropism; Reflective materials Read More

LIGHTS, ELECTRIC: At Night and Their Effect on Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Lighting for 24 hours stimulates some seedlings; it has no advantageous effect on mature plants; most species flower best under short days, from 12 to 14 hours of light and are inhibited by 16 hour... Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More