Newly Posted Articles

HUMIDITY: Additional Amount Applied to Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Do not use a tank-like enclosure; partially enclose the plant; if leaves are firm use a tray with pebbles and place the plant on it; if the room is dry add a humidifier. A70-235 Read More

HUMIDITY: Altitude Difference

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago At sea level, which is where the phalaenopsis mostly grow, 100% relative humidity means a lot more water vapour per unit volume of air than at an altitude higher up, so there is a vast difference b... Read More

CARBON DIOXIDE: Fact or Fiction

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Answers to questions: what is it?; is it important?; why use it?; is it safe?; does it fertilize plants?; soil fertility levels?; greenhouse temperatures?; ventilation?; checking C02 levels; crop r... Read More

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 Read More

CATASETUMS: With Unisexual Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago About 99 species produce male (staminate) flowers and female (pistillate) flowers on the same plant; inflorescences with male tend to be longer, more arching and floriferous, generally the flowers ... Read More

CATTLEYA DOWIANA: Difficult to Grow

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use 2,500 to 2,900 fcs.; constant moisture; no direct sunlight; use fiberglass or frosted glass as covering; no overhead spraying; use temperature of 60 deg.F. at night and up to 75 deg. F. days; u... Read More

LIME: Oyster Shell, Its Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 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

PHALAENOPSIS: Chill Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago To get them to flower when everything appears favorable, lower the night temperature in the late fall for a spell to about 55 dF. A87-818 Read More

CATTLEYA INTERMEDIA VAR. AQUINII: Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago All plants in cultivation are said to be divisions or selfings of divisions of the original; a peloric phenomenon; petals only show the splashing which is also in part a reduplication of the lip fo... Read More

XEROPHITIC ORCHIDS: Some Examples

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The genera include Angraecopsis, Cyrtorchis, Jumellea, Microcoelia, Rangaeris, Tridactyle and Ypsilopsis; plus Oncidium onusturn and Epidendrum boothianum. A80-1140 Read More