Category: Orchid Doctor

RESUPINATION: Twisting of the Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Most orchids, as their flowers develop have their lip in one position but as the flowers open they twist through 180 degrees so that the lip is in an opposite position; refer to W2-287 Read More

REVERSE OSMOSIS: Water Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago An outline of techniques and apparatus used to grow a variety of plants in Canadian peat moss in California using an apparatus and a meter to measure the contents of dissolved solutes (salts and wa... Read More

REVERSE OSMOSIS: What Is It?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A water filtration system, it removes most of the harmful mineral salts including white calcium residue-forming salts; available in five, fifteen or 25 gallom per day sizes; advt. A88-303 Read More

RHIZOMES: Circular Growth in a Pot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Can be achieved by breaking off an eye consistently on one side to force growth inwardly. ODA71-72 Read More

RHYNCHOVANDAS: Old Leaves Are Spotted

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago This characteristic seems to be inherited, both in this genus and in Vascostylis; the older leaves are highly susceptible to fungal infection; use Banrot to minimize the effects. F82-31 Read More

RICE HULLS: Properties as Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Approximately the same as for peanut shells, which see. Read More

RING SPOT: On Odontoglossums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A virus disease caused by Tobacco Mosaic Virus -- Orchid Strain, one of the two viruses common in orchids; Odontoglossum ring-spot virus is the same thing. A73-818 Read More

RING SPOT: Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Shows up on leaves of Dendrobium antennatum but produces no floral abnormalities; a bacilliform virus. A74-529 Read More

ROCK, LANDSCAPING: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various forms have been used, especially lightweight lava aggregates used in the manufacture of concrete products; similar products go under different names such as Holite, Solite, Herculite; they ... Read More

ROCK: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Crushed rock, sized according to the size of the plant, from roofing gravel up to about 1.5 inches; after a few years repotting is necessary because the spaces between the rocks become full of root... Read More