Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
During darkness essential oils are made by plants and released even when the hours of darkness are extended to 50; the flower only detects the absence of daylight. A78-510
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PERISTERIA ELATA: A Problem Plant
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
Cultural directions: the vital rest period may be missed if use of frequent liquid fertilizings stimulates the vegetative growth, if there is strong light during the night; temperatures should be a...
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PERLAG: Aggregate
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
As potting medium additive: it is inert, sterile, has neutral pH; experiments with potting 150 seedlings in several mixes; 1/2 coarse Perlag with 1/2 lumpy peat or bark, plus some charcoal is recom...
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PERLITE: Aggregate
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
Additive to potting mixes: white, light product of volcanic origin; inert, holds water, does not decay; keeps medium open; use agricultural grade. OD77-4; RMH
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PERLITE: As a Culture Medium
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
Coarse perlite alone with a half-inch topping of pea-gravel makes for a healthy root system on a cattleya with normal watering and feeding;a test of two parallel sets of phalaenopsis plants, one in...
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PERLITE: As Potting Medium
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
Screen out the fines through a window-screen mesh; place some drainage in the bottom of the pot; position the plant then pour in the Perlite to within an inch of the pot top then cover with half an...
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PERLITE: As Potting Mix
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
A processed volcanic material, sized, but best for orchids over one-eighth inch in size; inert; inorganic; requires a balanced fertilizer such as 20-20-20 if used alone; mainly used as an ingredien...
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PERLITE: Composition
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
It is a calcined mixture of, principally, gypsum (Calcium sulphate) and white clay, with small amounts of other materials all heated to very high temperatures to cause incipient fusion and causing ...
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PERLITE: Opinions of the Experts
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 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...
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PESTICIDES: Application Safeguards
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
They are all toxic so beware of them; wear protective clothing and a face-mask because ordinary clothing absorbs the spray; notify someone outside the greenhouse that you going to spray; always sho...
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