Category: Culture

SUNLIGHT: Why Morning Sunlight Is Preferable

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Most plants are more active photosynthetically in the early morning; humidity is usually more favorable; temperatures are more conducive to efficient photosynthesis; morning sunlight in many places... Read More

SUPERPHOSPHATE: A Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago On cymbidiums and cattleyas use a heaping teaspoon spread evenly over a 10-inch pot surface, or half that for an eight-inch pot of a cymbidium; for cattleyas use five level teaspoons in five gals, ... Read More

SUPERPHOSPHATE: What Is It?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is the end product obtained when rock phosphate is mixed with sulphuric acid but not phosphoric acid; it contains about 16 to 20% of P205 (means soluble phosphate), A61-981; single super-phospha... Read More

SYMBIOTIC CULTURE: For Small Numbers of Seeds

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Place the seed when gathered on the surface of the medium of the parent pot, or other genus, and spray lightly with water; treat as normal; or, use flat four-inch pans nearly filled with chopped tr... Read More

TAN BARK: As Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is used in Australia; a local wattle-tree bark after it has been through the tanning process. A75-713 Read More

TEMPERATURE: Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In a confined area where fluorescents are used such as in a space four feet by five feet heat is generated by the ballasts which can be rewired to operate outside the closet; a fan circulating the ... Read More

TEMPERATURE: Controlled

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cold nights artificially supplied substitute for the real thing for some genera; cymbidiums, odontoglossums and some dendrobiums can be set inside a refrigerator at night for a time to set buds. A6... Read More

TEMPERATURE: Cool-growing Conditions

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are wide-spread in Mexico; orchids there thrive on their cold, dry winters in higher elevations; the night temperatures hover in the low 40's; little if any rain falls from November to May. A7... Read More

TEMPERATURE: Day-night Differential

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For cymbidiums in summer a differential of 25 deg.F. between night and day is usual. A71-202The number of hours of cold necessary to set buds in phalaenopsis is less than ten nights below 60 deg.F.... Read More

TEMPERATURE: Day-night Variation Recommended

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Warm greenhouse, Summer: Nights -- 65 to 70 deg.F, or 18 to 21C., Days -- 70 to 80 deg.F, or 21 to 27 C.; Winter: Nights -- 60 to 65 deg.F. or 16 to 18 C., Days -- 65 to 70 deg. F. or 18 to 21 G.; ... Read More