Newly Posted Articles

BARK: Pine or Fir

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Fir bark as used in the U.S. does not require "composting" to condition it before using; pine bark as used in Australia may benefit the plants by first being "composted", especially local barks; th... Read More

BARK: Sequoia Type

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It's a mixture of several barks, fir, pine and spruce. OR85-255 Read More

OSMUNDA: Preparation for Use

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It grows in swamps; grub out the roots of the fern; dry them and remove soil and debris; sterilize with methyl bromide, to kill weed seeds, but handle with care; store in burlap bags; for use, soak... Read More

PH (GENERAL): Conditions; Growing Under Controlled Levels

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago 4.5 to 5.0 is "very strong acidity" and 5.0 to 5.5 is "strong acidity" and are the leveIs at which orchids grow better; indirectly, pH affects the availability of the fertilizer elements to the pla... Read More

CARBON DIOXIDE: Enrichment Effects

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago On cymbidium and cattleya seedlings and mericlones it definitely stimulates growth; normal outside concentration is about 300 ppm.; 1,000 ppm. was found best experimentally; being heavier than air ... Read More

ETHYLENE: From Natural Gas Leak

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It took four or five days for the effect to show as bud drop and flower loss on phalaenopsis, OD69-272 Read More

LIPS: Discoloration

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Brownish discoloration near the base is caused by low temperature. A67-574 Read More

GREENHOUSES: Foundations Constructed of Creosoted Railway Ties

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The creosote should be coated carefully with linseed oil; for added protection from the creosote fumes areas exposed on the inside should be covered with aluminum foil. A73-615 Read More

LIME: Oyster Shell, Its Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is calcium carbonate lime; ground up shells comes in coarse type for chicken scratch or flour type used by many orchid growers. C74-51 Read More

XEROPHITIC ORCHIDS: Some Examples

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The genera include Angraecopsis, Cyrtorchis, Jumellea, Microcoelia, Rangaeris, Tridactyle and Ypsilopsis; plus Oncidium onusturn and Epidendrum boothianum. A80-1140 Read More