Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
Tends to reduce break-down in pots; is broken down rapidly itself by fertilization; if not changed every 12 to 18 months its decomposition will kill roots. OD69-63
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PALCO WOOL: Shredded Redwood Bark
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
Used as an additive in potting mixes; tends to be acid. A76-775
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CARBON DIOXIDE: Percentages of Composition
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
In air it is about three hundredths of one percent; plants can use greater amounts to approximately 0.5 to 1%; data not related to orchids. OR72-34
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PEANUT SHELLS: As Potting Medium
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
It is a waste product; shows promise as a substitute for peat moss; use in the coarse form; it provides porosity, drainage, aeration and water penetration; the pH is 5.5, slightly acid, which can b...
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PEAT MOSS: Handling
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
Persons handling peat moss can contract sporotrichosis an unpleasant fungus infection which can enter the skin through nicks and abrasions, or be inhaled; the first is usually mild and is treated w...
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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: 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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PH (GENERAL): Adjustment
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago
How to bring it down to normal: do not use a sodium salt; the simplest thing is to use dilute phosphoric acid, at a few drops per gallon of water. A78-698
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FERTILIZERS: 30-10-10 with Soil Acidifiers and Chelated Iron
Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 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
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