Newly Posted Articles

VANDAS: No Blooms

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Vanda hybrids with V. sanderiana blood will not bloom if kept too cold, even when located south of Miami; also, relatively strong light is necessary. A71-345 Read More

BUD DROP: In Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago May be caused by several things: temperature dropping too low when buds are developing; shortage of water while forming or about to emerge; a weakened condition caused by lack of fertilizer, too mu... Read More

CATASETUMS: With "perfect" Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Means "bisexual" flowers with functioning male and female parts; these have recently been transferred in classification to Clowesia and Dressleria; the majority of Catasetums have unisexual flowers... Read More

CATTLEYAS, BIFOLIATES: Breeding

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Bifoliate yellows, bronzes and greens from Brazil, especially the importance and place of C. aclandiae, granulosa, velutina, forbesii; their pros and cons in breeding; habitats and cultivation in f... Read More

CATTLEYAS, BIFOLIATES: Cultural Problems Set Right

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For professional advice on light requirements, specific temperatures to use, watering practices, humidity levels, fertilizing routines, etc., with much related detail, refer to A83-129; 344;469;612 Read More

CATTLEYAS, MINIATURE: Sheaths Dry Out Without Buds

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Reasons are variable and uncertain but C. mossiae hybrids produce flowers after sheaths dry, they flower fall to spring; if the problem is wide-spread the culture may be faulty; other causes may be... Read More

FRAGRANCES: In Stanhopeas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Identification of the chemical components and the use of synthetics to attract pollinators; refer to A82-1262 Read More

VARIETY: Use of the Term

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The name of a varietal form is placed after that of the species or hybrid; a botanical variety is preceded by the word variety or its abbreviation var.; example: Dendrobium fimbriatum var. occulatu... Read More

VENTILATION: Rate of Exchange

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago On hot days the greenhouse needs one change of air per minute by exhaust fans. A78-606 Read More

VENTILATION: Size of the Vents

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They should be at least 10% of the roof area as a minimum. RMH Read More