Newly Posted Articles

PAPHIOPEDILUMS: Flowering Produced by Shock Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Reluctant hybrids require a change in their growth pattern such as by dropping temperature to 40 deg.F. from the normal 55, and withholding water until the compost dries; or, by dividing the plant ... Read More

PAPHIOPEDILUMS: Light Control Response for December-february Flowering

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago There is no response; they respond only to temperature control. A65-152 Read More

GREENHOUSES: Solar Lean-to Type

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In Massachusetts, a design with construction details for efficiency in operation; illustrations, plans; refer to A83-1031 Read More

VENTILATION: Exhausting Hot Air From the Greenhouse Peak

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Install a turbine generator as high as possible with a small fan under it blowing straight up; refer to A83-52 Read More

NAMES, CULTIVAR: Their Orchid Hybrid Recognition

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A strong plea for publishing the names of the cultivars used in crosses; the grex is more important than the mass of progeny; refer to OR87-68; the reasons why it would be wrong to publish them; th... Read More

POTTING MEDIA: Re-use

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Never, under any circumstances use old potting media to re-pot your good plants. A75-481Opinions may vary as to the advisablity of using old media on good plants; material accumulated from old catt... Read More

PAPHIOPEDILUMS: Recovery Treatment for Troublesome Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They were set back because they were potted in live sphagnum moss which has a pH of about 4.5 to 5.0, which is too acid for many paph. species; but in spite of this, when they were watered with rai... Read More

PAPHIOPEDILUMS: Palco Wool as Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They grow poorly in shredded redwood bark, possibly because it is too acid. OD68-9 Read More

PAPHIOPEDILUMS: Ph of Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago PH is checked every six weeks and when it is under 6.0, too low, plants are watered with dilute dolomite. A75-711 Read More

PAPHIOPEDILUMS: Problems and Pests

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Repot ting, propagation, mealybug control, bacterial rot, flower-blight, genetic confusion, leaf-tip die-back, necrosis,etc.; refer to A82-1157 Read More