Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
In California use 73% for both them and Paphiopedilums. A86-719In New York State in winter use not more than 25%. A81-688
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SHADING: Lath Blinds
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
These can be used to reduce the heating effect of sunlight and not its intensity by a compromise in lath blinds; raise parallel runners about nine inches above the glass and rest the rolled-up lath...
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SHADING: On a Fiberglass Greenhouse
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
To vary the shade with the season; if the fiberglass corrugations run east-west, the high curves can be shade-painted leaving the trough area of strips clear to provide about 30% shade and as the s...
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SHADING: Purpose
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
It reduces both the heating effect of the sun and the intensity of light, so a compromise is always in order; the best by test is lath blinds, placed about one foot above the roof, and rolled into ...
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SHADING: Removing it
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
A wire brush on a long pole, using water and soap, or Sal soda (Sodium carbonate -- washing soda, if you can find it) are aids to its removal. OD87-10
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SHADING: Supplementary Type
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
Ordinary plastic door or window screening provides about 2 0% screening, and two layers can be used effectively in an emergency. A85-1109
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SHADING: Too Much
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
70% shade for cattleyas will produce thin and weak plants, the surest sign of not enough light, and 55 to 63% is usually recommended (in California?) A84-1061
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SHADING: Whitewash
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
A substitute for the old-fashioned whitewash can be found in a product used for marking lines on playing fields, such as baseball diamonds; one name for it is Sportsfield Whiting; mixed with water ...
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SLABS: New Materials
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
Stonel and Polybase mentioned as being tested as growing substrates; no results given. A82-507
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SOLAR CHIMNEY: A Ventilator for Greenhouses
Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago
It harnesses the heat of the sun for a chimney 2 feet square rising 12 feet above the greenhouse roof, painted black on the inside except for the south exposure which is glazed, with a trap at the ...
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