Newly Posted Articles

CONSERVATION: Survival and Maintenance

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For world data on the almost insurmountable problems, refer to A87-822 Read More

STEMS: Too Weak for the Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Weak stems can be caused by dull and/or short days, overfertilization with nitrogen, loss of sheath, or flowers bred too large for their stems, especially common in Brassavola crosses . A84-819 Read More

FANS: To Reduce Pests

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use furnace filters tied on the intake side of the fan to remove dust, some bacteria, fungus and pests. OIE85SeptT5; very likely more efficient than a negative ion generator. RMH Read More

LEAVES: Sunburned

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The best treatment is to remove only the badly burned ones; partly burned ones are unsightly but still functional. A69-130; A75-906; A79-334 Read More

BARK, REDWOOD: Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 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

LEAVES: Variegated Green and White

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The plant was negative when tested for virus; it is possibly a variegated sport. A61-658; illus. of an awarded plant. A77-831 Read More

LEAVES: White Patches

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Check the Mg and Fe levels in the fertilizer and increase one or both. Au84-204 Read More

LEAVES: White Patches on Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Most likely this is caused by cold damage which results in sunken cell-wall collapse, likely on plants too near a cold wall or under a cold-water drip; always use water for watering which is warmer... Read More

PH (GENERAL): Of Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A pH8 to 9 of the 30-10-10 fertilizer is natural and should not be adjusted because the alkaline state changes to the acidic side when used by the plant. A81-27 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