Category: Culture

FLOWERING, TIMING: Only Way to Control it Is by Temperature

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Warmth hastens flowering while coolness retards it; but sun heat can work against low heat. A78-13 Read More

FLUORESCENT LIGHTS: Best Height Above Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Two inches; prop up the small plants. A70-427; A75-298 Read More

FLUORESCENT LIGHTS: Cattleya Types Produce Only Vegetative Growth

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Keep night temperatures to 60-62 deg.F. and days to 78-85 deg.F., with not more than 13 hours light. A69-424 Read More

FLUORESCENT LIGHTS: Cost of Electricity

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In 1977 the monthly cost for electricity was about $3.84 for four tubes burning 16 hours a day, with space for 50 plants. A77-897 Read More

FLUORESCENT LIGHTS: Footcandles At Various Distances

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Illumination reduces quickly on increasing inches distant from lamps; examples: one inch from two lamps gives 1,1OOfc.; at three inches 680fc.; at six inches 420fc.; at nine inches 300fc. US Dept. ... Read More

FLUORESCENT LIGHTS: For Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Two 48" Wide Spectrum, with two 48" cool-white tubes and with four 25-watt incandescents in one reflector gives 1,000 fc. five inches from the tubes; with 13 to 15 hours per day as adequate for pap... Read More

FLUORESCENT LIGHTS: Generate Too Much Heat

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Rewire the ballasts outside the closet; or, any fan in use must not only circulate air but ventilate to an outside source of cool air. A72-1003 Read More

FLUORESCENT LIGHTS: How Many Tubes for Bench Width?

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 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 over 7 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

FERTILIZERS: 30-10-10 with Soil Acidifiers and Chelated Iron

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A suitable fertilizer, use 1/2 tpg. at every watering but let 10% of the liquid run out of the pot for leaching action. A74-114 Read More