Category: Culture

CHLORIDE: In Fertilizers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 1% or 2% chloride in dry, soluble fertilizers contributes an insignificant amount to the final product; many tap waters supply a higher chloride content; 1% chloride contributes only 12 ppm. to the... Read More

CALCIUM CARBONATE (CACO3): Used in Mixes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In paphiopedilum mixes it is used as an additive in various forms: chalk, limestone, marble, magnesium limestone, gypsum, coral, shells of molluscs, etc. A75-712 Read More

COOL-GROWING PLANTS: Low-energy Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago List of about 60 given; plants which will stand a few degrees of frost and grow in a greenhouse with controls set for a minimum of 40 deg.F. A78-39+ Read More

CARBOHYDRATES: Formation and Respiration

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are the focal point of growing; they determine greenhouse design, potting media, fertilizing levels, flowering, temperatures and humidity requirements and concepts. AU79-35 Read More

CORK BARK: What Orchids Grow on It?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Many epidendrums, oncidiums, small dendrobiums, and cattleyas will grow on cork slabs; ground cork pieces, if medium bark sized, can be used instead of bark but they hold less moisture than fir bar... Read More

CARBON DIOXIDE: Air Fertilization Data

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Experiments on non-orchid plants in Vermont; also on cattleyas in Tokyo; both with beneficial results; most effectively applied in the afternoon; use dry ice in coffee cans wrapped well in newspape... Read More

ANGRAECUMS: Minimum Optimums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 55 degrees F. at night; 50% relative humidity; 2,000 fcs. winter, 4,000 fcs. summer. AU71-135 Read More

ALASKA: Growing Orchids There

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Long winter days may be a serious problem; fertilize in winter 1 tpg. 30-10-10 every two or three weeks; in summer's long days, every second watering; in osmunda water only in summer. A71-715 Read More

COLD TOLERANCE: Plants Most Tolerant of Cold in Florida

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cattleyas for the most part, epidendrums, oncidiums, except Onc. ampliatum, laelias, brassavolas, miniature cymbidiums; not tolerant are phalaenopsis, doritaenopsis; ascocendas, dendrobiums, renant... Read More

ALARM SYSTEMS: How to Make One

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Basic requirements are a six-volt car battery, a bell or a buzzer, an ordinary bell transformer, a 24 volt A.C. relay, a set of contacts, an inexpensive bell button, a shut-off switch, extension wi... Read More