Category: Orchid Doctor

LIGHTS, ELECTRIC: Blue Lights

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Plants grow faster under them, up to 50 to 70% faster in a blue-light enriched environment; photoreceptors in leaves absorb the light and initiate opening of spores in the stomata; no reason given.... Read More

LIGHTS, ELECTRIC: Fluorescent and Incandescent Used to Induce Flowering

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Long hours per day, from 15 to 18, especially added to incandescent light, will inhibit flowering. A66-914; A73-503 Read More

LIGHTS, ELECTRIC: Hours of Use

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Experiments indicate that using artificial light in the early morning in the greenhouse is a waste of money; instead, turn them on at 3 ofclock in the afternoon when the light is naturally strong; ... Read More

LIGHTS, ELECTRIC: In Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Two systems are treated, one as in an enclosed room area and the other as supplemental lighting in a greenhouse; analysis of sunlight and of various lamps given; photosynthesis sensitivity curve pr... Read More

LIGHTS, ELECTRIC: Interference with the Growth Pattern

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago An electronic insect-killer with an 80-watt power lamp left on outdoors at night 50 to 60 feet away from summering cattleyas will affect them by delaying flowering to a later date, A84-1180 Read More

LIGHTS, ELECTRIC: Interrupted to Save Electricity

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It can be done and has been proven by Thomas Young Orchids as feasible: "on" for ten minutes and "off" for thirty; can be applied in the middle of the night, from midnight to 2 A.M. approximately. ... Read More

LIGHTS, ELECTRIC: Longer Duration as Compensation for Low Intensity

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For most plants this is so, but in some cases high energy for a short period is essential for the plant. OR78-318 Read More

LIGHTS, ELECTRIC: Metal Halide, 1000-watt Lamps

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Useful but the drawbacks are the high cost of the equipment that goes with them and of the electricity they burn; Vita-Lite can be used first to gain experience. A85-471 Read More

LIGHTS, ELECTRIC: Outside Sources

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cattleya trianaei hybrids react to night light so a street light 25 feet away will stop flowering of the plant; cover plants with black sateen from 4 p.m. to 8 a.m. every night. A83-816The effect o... 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