Category: Orchid Doctor

TEMPERATURE: Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago An Electronic Aspirated Screen designed for the grower that wants reliability and close tolerance of temperature and the option of day and night temperatures; for technical details and specificatio... 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

TEMPERATURE: Effect on Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Lower temperatures at night aid the growth process; it slows the rate at which reserves are burning themselves up to form carbon dioxide and water; also, when the weather is dull it helps plants to... Read More

TEMPERATURE: Intermediate

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Definition and discussion, the variables met with in nature and ways of achieving them in the Kew greenhouse; refer to OR86-252; A81-640 Read More

TEMPERATURE: Maximum

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago During daytime in summer 85 deg.F. should be the maximum; above that the harm may not be apparent but it does no good; better to control the temperature as much as possible. A73-487In the greenhous... Read More

TEMPERATURE: Minimum

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For cattleyas; for relatively dormant plants which have been exposed to a night or two of lower temperatures in the 40's can stand a few days just above freezing; with new growths developing a nigh... Read More

TEMPERATURE: Recommended for Winter in the Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cool: December -- Night 50 and Day 55; Intermediate: Dec. -- 58 and day, 58 to 65; Warm: Dec. 68 and Day 68 to 73; with a slight difference in January Cool: Night 50 and Day 55; Intermediate 59 to ... Read More

TEMPERATURE: To Set Buds

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Paphiopedilums and phalaenopsis initiate buds after two or three weeks of night temperature below 14 dC; hardcane dendrobiums require near 18 dC, and softcane dendrobes need about 13 dC; in cymbidi... Read More