Newly Posted Articles

LIGHTS, GROWING UNDER: Cultural Practices

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For pointers on growing plants under fluorescent lamps; they require certain conditions and treatment which are set out in Read More

MALATHION: Effectiveness on Spider Mites Questioned

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The residual action is short-lived, but with a wetting agent the spray is effective when used repeatedly to break the mite cycle; other better miticides are available. A76-1007 (see Miticides) Read More

LIME WATER: Recipe

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago One tsp. of hydrated lime is dissolved in a gallon of water; may be used to adjust the pH of potting media, upwards. A79-898; 1/2 tsp. limestone per 6 inch pot raises pH 5.0 up. A80-739 Read More

MITES, PHALAENOPSIS: Characteristics and Damage

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Tenuipalpas pacificus causes purplish discoloration to the bottom of leaves; the green fades and yellowing occurs; or first indication can be deep pits or sunken areas and slight olive-colored or r... Read More

PHALAENOPSIS: Flower Stems, Cutting Them Off

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Do not cut back below the first vegetative bud; cutting the stem base stops their ability to flower again, with rare exceptions. A75-124; A78-812 Read More

PHALAENOPSIS: Leaf Crinkling

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Causes include genetics, mechanical problems, or lack of water; check the roots, if they are dry and blunt-tipped you have a problem with soluble salts and if so, cut off the spike flush with the t... Read More

PHALAENOPSIS: Leaf Pitting and Collapse

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It can be induced by exposure to cold temperatures of 35 to 45 dF (2 to 7 dC), the amount depends on length of exposure and the age of the leaves, old ones being less susceptible; mesophyll leaf co... Read More

PHALAENOPSIS: Minimum Optimums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Temperature at night: 65 deg.F.; relative humid ity 60 to 70%; footcandles in winter: 500 to 1,000, and in summer: 1,500 to 2,000. AU71-135 Read More

PHALAENOPSIS: One Out of Many Does Not Bloom

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Much more light than is normal, up to 2500 foot-candles will sometimes induce them to bloom. A82-1259 Read More

PHALAENOPSIS: Stem Reduction

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Cut them back preferably about the first of September. A88-262 Read More