Newly Posted Articles

VANDAS: Lack Roots Up-stem for Repotting

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Air-layer the stems to induce rooting by wrapping some places on the stem with moist sphagnum wrapped with polyethylene secured top and bottom with string or elastic, until new roots are large enou... Read More

PAPHIOPEDILUMS: Flowering Produced by Shock Treatment

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