Newly Posted Articles

ETHYLENE: To Measure Content in Greenhouse on a Scientific Basis

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use of the gas chromotograph outlined; refer to A69-415 Read More

FERTILIZERS: For Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In nutrient culture, growth of hybrid plants was optimal with 50 ppm. each of nitrogen, potassium and magnesium. RHIn parts per million: N-50, P-20, K-50, plus Mg-50. AU82-98 Read More

BENLATE: On Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Caused production of infertile pollen. A79-898 Read More

LEAVES: Yellowing

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Usually caused by too high light levels and indicates the lighting should be reduced by 25 to 50%; also, increase the Mg and Fe in the fertilizer. Au84-204Young leaves on new cymbidium shoots turne... Read More

AGGREGATES, LIGHTWEIGHT: As Potting Media

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Made from clay or pulverized fuel ash or fired shale; cheap, clean, hold water, do not float, or rot, can be reused or mixed with sphagnum,etc.; Taclite, Lytag, Leca, etc.; refer to OR76-160 Read More

FERTILIZERS: For Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In nutrient culture, growth of hybrid plants was optimal with lOO ppm. of nitrogen, 50 to lOO ppm. of potassium and 25 ppm. of magnesium. OA79-127 Read More

FERTILIZERS: For Plants in Osmunda

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It needs little if any fertilizer; 1 teaspoon 20-10-10 or 30-10-10- in two gals. water is sufficient at monthly intervals. A67-517 Read More

FERTILIZERS: For Repotted Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago To stimulate root growth in fir bark mixes keep the same regular schedule with 20-10-10 or 30-10-10 but make it more diluted. A74-433 Read More

DAMP-OFF: Control

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Spray Captan at 1 ttpg., or PCNB (Terraclor) at 1 ttpg. as pot drench; also Chinasol, oxyquinoline benzoate (Wilson Anti-Damp), or sodium-o-phenylphanate (Dowicide Ai, Natriphene, Sopp, or Topane) ... Read More

CYMBIDIUMS: Culture to Induce Spiking

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago "full-sun" treatment can be successful; give as much sun as possible in the summer including risk of sunburn and with more water and fertilizer, OD68-244The day-night temperature change must be 20 ... Read More