Newly Posted Articles

RAINWATER: Its Ph

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Falling rain water absorbs carbon dioxide from the air which lowers the pH to about 5.5; the pH is changed also by contact with vegetation, soil, etc. F68-112 Read More

RESUPINATION: Flower Position

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The significance of the various degrees of twisting that flowers undergo; the lip as a landing platform for most pollinators; refer to OD85-99 Read More

CORK BITS: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Fertilizers that might be appropriate for this would likely be balanced ones (20-20-20) because cork is relatively inert and does not tie up nitrogen like bark does. A85-866It is normally slow to d... Read More

COPPER ARSENATE, CHROMATED: Problems

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Lumber treated with it for greenhouse construction etc., cause some root-tips to die on contact and its fumes discolor plastic film. A79-910 Read More

COPPER WATER PIPES: In Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Are very popular; not likely to harm plants unless water supply has a high carbonic acid content. A76-1102 Read More

ROOT TIPS: Adventitious Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago May be of significance for meristemming of the Catasetum-Mormodes-Cycnoches alliance; Catasetum roseum under cultivation, and Mormodes luxatum in the wild both grew mature plants from the roots. OD... Read More

CORKS, WINE: Recycled, as Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Whole corks are useful for potting thick-rooted vandaceous plants, are good for drainage when pebbles are used in the bottom of the pot, they maintain a coarse open space when mixed with charcoal p... Read More

TRACE ELEMENTS: Usual Ones

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Recognized are iron, manganese, molybdenum, boron, and copper. OA83-118 Read More

FERTILIZERS: Injury Caused by

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A frequent problem; only 2% of the composition of the plant tissue includes mineral content; over-fertilization inhibits growth; diluted liquid fertilizers are best; nature of damage caused and des... Read More

FERTILIZERS: Inorganic, Made From Chemicals

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Can be compounded to exact specifications; makes them flexible and adaptable to special conditions and trace elements can be added as required. A70-140 Read More