Category: Orchid Doctor

FLUORESCENT LIGHTS: Turning on in Living Room Area Where Plants Also Grow

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Probably no photoperiod effect; fluorescents are not very effective for photoperiod control; the 15 to 30 fc. emitted at a distance would not affect Den. phalaenopsis. A73-888 Read More

FLUORESCENT LIGHTS: Two-tube 48" Fixture

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Gives inadequate (600-800 fc.) lighting two to three inches from plants; a four-tube 48" gives 800-1,000 fc. four to six inches away. A78-226; eight tubes for 16 square ft. recommended, with a 60-w... Read More

FLUORESCENT LIGHTS: Types Available

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A review of kinds of tubes: Cool White; Daylight; Warm White; Gro-Lux; Vita-Lite; Verilux; High Output; Super High Output; High Intensity Discharge; refer to A75-292+ Read More

FLUORESCENT LIGHTS: Types Used

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago One grower uses half Gro-Lux Wide Spectrum and half Vitalite Power Twist. OIE85Jan-13 Read More

FLUORESCENT LIGHTS: Vitalite Power Twist

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Main types of plants can be flowered under them if placed as close to the bulbs as possible without burning for these hours: 16 to 18 in summer; 14 to 16 in spring and fall; ten to 12 hours in wint... Read More

FLUORESCENT LIGHTS: Wattage Per Square Foot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Tubes 12 inches above the leaves provided 20 watts, barely enough to satisfy phalaenopsis; six tubes arranged in a dome shape supplied 30 watts; a VHO-fixture having the intensity of three normal t... Read More

FLUORESCENT LIGHTS: Weak

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Some stores sell cheaper units made in Taiwan and elsewhere which deliver only 300 foot-candles compared with the normal 800 fc required by plants. OIE85Jn-4 Read More

FLUORESCENT LIGHTS: Why Not Place Vertically?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They will operate that way but the leaves' cells display more chlorophyll on the upper surface, and derive more stimulus. A74-300 Read More

FLUORINE: In Water Supply

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It will not harm orchids. A74-502 Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More