Category: Culture

PERLITE: Opinions of the Experts

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Some use up to 50% in cynbidium mixes and get excellent results; the horticultural grade #3, is coarse and stimulates root development; several growers believe it retains too much moisture at the b... Read More

FERTILIZERS: Best After Test

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Levels of fertilizing on cymbidiums which gave best results were N -- 100ppm., P -- 20ppm., K -- 75ppm., Mg (Magnesium sulphate) 25ppm., and Fe (Chelated Iron) 8 to 10ppm.; these represent very wea... Read More

FERTILIZERS: Best for Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In an experiment in Southern California a balanced 20-20-20 produced 50% more spikes than 25-10-10 at the end of two years. OA84-78 Read More

GREENHOUSES: Automatic

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago By use of Envirorrdl designed for a fan heater of 2400 watts output at 10 amps, one evaporative cooler and a circulating fan; suitable for an area 12 ft. by 8 ft.; for details see AU87(l)-36 Read More

LIGHTS, ELECTRIC: Interference with the Growth Pattern

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 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, GROWING UNDER: Continuous Light

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Non-stop light is wasteful; up to 16 or 18 hours is beneficial but after that the plants do not benefit; in winter in southern areas street plants growing under lamp standards show stress because t... Read More

LIGHTS, GROWING UNDER: Cultural Practices

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For pointers on growing plants under fluorescent lamps; they require certain conditions and treatment which are set out in Read More

LIME WATER: Recipe

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago One tsp. of hydrated lime is dissolved in a gallon of water; may be used to adjust the pH of potting media, upwards. A79-898; 1/2 tsp. limestone per 6 inch pot raises pH 5.0 up. A80-739 Read More

POLYETHYLENE FILM: As Greenhouse Insulation Liner

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use the regular type rather than the ultraviolet resistant type because the former is adequate; greenhouse glass filters out rays shorter than 312 millicrons. A68-911 Read More

POLYETHYLENE FILM: Liner for Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For conserving heat the most economical is the 4 mil polyethylene; it provides a slight shading effect. OD78-2 Read More