Newly Posted Articles

HEATERS: Wood-burning Stoves

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are not recommended because they ruin most orchids unless the draft is fully open at all times to discharge fumes into the neighbour's back yard. A81-526 Read More

PH (GENERAL): Of Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Experiments show that if a recommended medium is chosen the initial pH should cause no concern. Hort. revs. 1983-195 Read More

HEATERS: Wood-burning Stove

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is apt to emit too much ethylene if it is not properly vented; burning wood is one of the worst sources of ethylene; it is now a crime to burn wood for heating purposes in London. A81-1436 Read More

LEAVES, PLEATED: On Calanthe, Lycaste and Phaius Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Add extra humidity by syringing early in the day; the "pleating" on these is normal and not across the veins. A67-139 Read More

ALGAE: Control in Cattleya House

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Physan 20 may be too expensive; Phygon is cheaper for use on evaporative cooling pads. A74-969 Read More

ALGAE: Control in Growing Trays

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago After watering plants, rinse the tray grave1 if possible and allow grave 1 to dry fully to kill algae; repeat periodically; or, spray grave 1 with Simazine 80W, 1 tpq. A70-535 Read More

ALGAE: Control on Surface of Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use 1.5 ttpg. of Maneb (Manzate) as heavy spray. A73-409 Read More

ALGAE: Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago When it occurs in a humidity tray holding water and pebbles, pour in a little chlorine (household bleach), let it remain for a while then decant and ventilate; or, use neutral copper. A86-929 Read More

LEAF CRINKLING: On Dendrobiums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by inadequate watering. A79-784 Read More

BARK, REDWOOD: Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Shredded bark used as insulation material and sold as Palco Wool was treated with fire-retardant ammonium phosphate which caused remarkable growth of plants. A87-1041 Read More