Category: Orchid Doctor

FLUORESCENT LIGHTS: Growing Under

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Three set-ups are described: Four daylight tubes with two 60W incandescents as a group. 2, Chroma 50's which simulate a summer sunshine-for colour and costs about the same as for daylight tubes, an... Read More

FLUORESCENT LIGHTS: How Effective Are the Twisted Ones?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Light is produced by the molecule in gas rubbing against each other and the more tube surface, the more light that is visible; twist-types have their surface area increased by 15 to 25%. A83-343 Read More

FLUORESCENT LIGHTS: How Many Tubes for Bench Width?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Not less than one tube for every four inches of width; for a two-foot wide bench use six fluorescent tubes. ODA75(4)-38 Read More

FLUORESCENT LIGHTS: Indoor Culture

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A review of 47 papers on growing under lights which appeared in the American Orchid Society Bulletin; refer to A77-318 Read More

FLUORESCENT LIGHTS: Minimum Requirements

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In a 3ft. x 3ft. x l8in. cabinet: two 3-ft. tubes placed nine inches apart; for high-light requiring plants: three 3ft. tubes which equals 90 watts for cattleyas, encyclias, oncidiums, dendrobiums,... Read More

FLUORESCENT LIGHTS: Mixed Tubes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cool-white with Gro-Lux, also Natur-Escent and Gro-Lux in a 1:1 ratio; four 40-watt tubes over 2 ft. X 4 ft. area is adequate light for cattleyas, miltonias, paphiopedilums and phalaenopsis. A66-92... Read More

FLUORESCENT LIGHTS: Optimum Amount for Seedlings in Flasks

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 40 watt per square foot at twelve inches distance is abundantly adequate. A74-969 Read More

FLUORESCENT LIGHTS: Preferred Types to Use for Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Gro-Lux is not strong enough; try wide-spectrum Gro-Lux; or, use regular fluorescent or V.H.0. type fluorescents; supplement with 25% incandescent, i.e. 50, 75 or 100 watts. A71-1021 Read More

FLUORESCENT LIGHTS: Selection

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A guide to much data on spectral distribution; alternate arrangements of lamp combinations; comparison of 40-watt whites; comparison of five horticultural lamps with cool-whites; comparison of 50 l... 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