Horizontal Reflective Hoods Marijuana Horticulture by Jorge Cervantes Horizontal reflectors are most efficient for HID systems, and are the best value for growers. A horizontal lamp yields up to 40…

Reflective Hoods Marijuana Horticulture by Jorge Cervantes Some reflective hoods reflect light more evenly than others. A reflector that distributes the light evenly – with no hot spots – can…

Plant Spacing Marijuana Horticulture by Jorge Cervantes When light shines on a garden, the leaves near the top of pants get more intense light than the leaves at the bottom.…

Rotting Plants Marijuana Horticulture by Jorge Cervantes Rotating plants will ensure even distribution of light. Rotate plants every day r two by moving them one quarter to one half turn.…

Side Lighting Marijuana Horticulture by Jorge Cervantes Side lighting is generally not as efficient as lighting from above. Vertically oriented lamps without reflectors are efficient, but require plants to be…

Lamp Spacing Marijuana Horticulture by Jorge Cervantes Light intensity virtually doubles for every six inches closer an HID is to the canopy of a garden. When light intensity is low,…

The Inverse Square Law Marijuana Horticulture by Jorge Cervantes The relationship between light emitted from a point source (bulb) and distance are defined by the inverse square law. This law…

Intensity Marijuana Horticulture by Jorge Cervantes High intensity discharge lamps are bright – very bright. Growers who properly manage this intense brightness harvest more weed per watt. Intensity is the…

Photoperiod Marijuana Horticulture by Jorge Cervantes The photoperiod is the relationship between the duration of the light period and dark period. Most strains of marijuana will stay in the vegetative…

Light Meters Marijuana Horticulture by Jorge Cervantes Most commercial light meters measure light in foot-candles or lux. Both scales measure light which the human eye reacts to “see”. They do…

Measuring Light Marijuana Horticulture by Jorge Cervantes Virtually all light is measured in foot-candles, lux, or lumens. Foot-candles and lux measure light visible to the human eye. The human eye…

PAR and Light Spectrum Marijuana Horticulture by Jorge Cervantes Plants need and use only certain portions of the light spectrum. The most important colors in the spectrum for maximum chlorophyll…

Light, Spectrum, and Photoperiod Marijuana Horticulture by Jorge Cervantes Marijuana needs light to grow. The light must have the proper spectrum and intensity to ensure rapid growth. Light is comprised…

Calendar Marijuana Horticulture by Jorge Cervantes The calendar starts on January 1st and is only three months long. To weeks for clones to stick (root), two weeks of vegetative growth,…

Calendar and Checklist Marijuana Horticulture by Jorge Cervantes A calendar helps growers know what to do and when to prepare t do it. A checklist add necessary routine to the…