Newly Posted Articles

POLYPLOIDY: Tetraploids in Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Chance occurrence has resulted in a number of great clones, such as Alexanderi 'Westonbirt', Pauwelsii 'Comte de Hemptinne', Rosanna Pinkie', and Babylon 'Castle Hill'; studies in chromosome mutati... Read More

PHAIUS GRANDIFOLIUS: A Problem Plant

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A good potting material: use two parts of very fibrous loam, two parts leaf mold, one part well-rotted manure, and one part coarse sand. A64-407; A70-1098 Read More

PH (GENERAL): Chemist's Term

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It refers to "potential hydrogen ion concentration"; it denotes the acidity or basidity of liquids of the soil solution; the neutral point is 7, acid solutions are lower than 7, basic solutions are... Read More

POTASSIUM: Excess Problems

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Scientific tests have Isolated potassium as the potential cause of growth retardation, particularly of flower stem length; a very little is too much and flower production can be reduced substantial... Read More

POT-BOUND PLANTS: Are They Necessary?

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago There is a difference of opinion as to whether some pot-bound plants perform better; the Dendrobium nobile types prefer a tight root mass, but the cane-type dendrobiums can be kept in an active gro... Read More

POTS (GENERAL): Soak in Clorox

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Make a solution of one part Clorox to four parts water; clean pots well of loose dirt before soaking one-half hour; follow with a washing, a thorough drying and a last rinse before using. A69-130; ... Read More

POTS (GENERAL): Sterilizing

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It's feasible to use a microwave oven if only a few pots at a time are done; use a temperature of only 180 dF for 30 minutes to kill harmful microorganisms; a better way is to place the pots in a p... Read More

POTS (GENERAL): Washing Them

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Scrape pots free of loose dirt; soak them overnight in 10 gals, water to which has been added one cup of citric acid; then scrub them in another 10 gals, to which has been added one-half gal. Cloro... Read More

POTS: A Kitchen Colander Can Be Used

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A ten-inch plastic one with a full complement of holes provided excellent drainage and aeration for a specimen miltonia, fitted into a normal pot. A82-586 Read More

POLLEN: Cattleya

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago From a stud plant producing a poor flower: if the plant is authentic the fact that the flower is not up to normal top quality has little effect on the merit of the pollen. A66-1025Removal time from... Read More