Category: Orchid Doctor

CATTLEYA WALKERIANA: A Difficult Plant to Grow

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 10 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 10 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 10 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 10 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 10 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 10 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 10 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 10 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 10 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 10 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