Category: Orchid Doctor

CATTLEYA WALKERIANA: A Difficult Plant to Grow

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is often grown on a slab of wood, bark or tree fern, high up in the greenhouse for good light; grown relatively dry, on which it thrives. A66-765 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: Breeding for Whites

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago If two whites are crossed and one has a C gene and the other an R gene the progeny will all be purple. F86-172 Read More

CATTLEYAS, BIFOLIATES: Bud Drop

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Can be caused by temperature too low for proper development or by a shortage of water, or by the presence of ethylene at a concentration of one part per million or more. OR82-101 Read More

CATTLEYAS, BIFOLIATES: Bud Rot in Sheath

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by rise of amount of moisture in the sheath through excessive watering practice, or a rapid chamge in the temperature such as is caused by the winter sun in a cold greenhouse. F87-123 Read More

CATTLEYAS, BIFOLIATES: Change to Unifoliates

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Seedlings often show bifoliate ancestry but mature and flower as unifoliates. A84-1182; A87-950 Read More

CATTLEYAS, BIFOLIATES: Control of Flowering

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago About June 1, cover the plants each night with black cloth draped over a rack completely at 5 P.M. and remove in the morning at 8 A.M.; flowers start in July and peak in August and September when m... 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, BIFOLIATES: Culture of Seedlings

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago When moved to single pots they differ from those in community pots by requiring slightly cooler temperatures, slightly brighter light and slightly less moisture. A87-615 Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More