Once the reservoir is filled with water-nutrient mix added water is clear, pH adjusted and nutrient free. Active hydroponic systems require irrigation two to four times a day. Warm gardens with large plants use more water than cool gardens with small plants. Reservoirs of re-circulating systems are refilled with pH adjusted nutrient-free water after each irrigation. Plants growing in soil-type mixes also must be kept moist. Small plants in a cool space may not need water for 4 or 5 days. Larger plants in a warm space may require irrigation daily, especially if they are kept in small containers. When watering most growers irrigate until the containers drain. Cold water can shock the roots and hot water can burn them. They do best when irrigated with lukewarm water, in the low 70’s. Smart growers know that fertilizers are best used as directed. The worst thing that a gardener can do is over fertilize, since this can cause the plants’ sudden death. The nutrient-water solution is changed every other week. The old water is drained and replaced with fresh nutrient-water solution. The system need not be rinsed. The old water is suitable for use in the outdoor garden to grow marijuana seeds.
THe co2 is good for many many things, it speeds up the general vegetative growth of the plant of 20-30% if used properly, it's cheap, and with the last generation tool is fairly simple to use. great! Once CO2 enrichment is added to the grow space, light will most likely be the limiting factor. The most practical method that a closet farmer has to enrich the garden with gas is a CO2 tank with a regulator for the cannabis seeds. the higher light preassure you have got, the more co2 you can introduce into the room (ventilate abondantly)
When marijuana germinates, it requires a modest amount of N and larger amounts of P. This supports vigorous root growth and limits etoliation (stretching) of the stem. When it goes into its vigorous growth stage, usually within two weeks, marijuana's need for N increases. The nutrient is used in building amino acids, the stuff protein is made from. During the reproductive stage when the plant flowers, the female’s flower growth is promoted by P and K. Plants which are being grown in soil mixes or mixes with nutrients added such compost, worm castings or manure do better when watered with a dilute soluble fertilizer, too,before the graines de cannabis. When a non-nutritive medium is used, the nutrients are supplied as a solution in the water from the beginning.
Both fluorescent fixtures and HID lamps use a much higher voltage of electricity than standard 110 volt house current. Fluorescent fixtures contain a ballast or transformer that converts electricity to its proper voltage. HID lamps sometimes come in a fixture containing the ballast, but most of the units made for indoor gardens are designed with the ballast remote (separate, but connected by an electrical cord) from the lamp and reflector. HID’s with remote ballasts are much more convenient than units with the ballasts enclosed since they weigh less. 400 watt ballasts weigh about 28 lbs. and 1000 watt ballasts weigh about 40 lbs. It is much harder to manipulate and secure a heavy object like that overhead than it is to just leave it near ground level attached to the lamp by an electrical cord. The lamp is hung from the ceiling using cord or wire attached to a hook or pulley. Outdoors, plants receive light from many directions. Over the course of the day the sun bathes plants in light starting in the east and travelling west. Leaves shaded during part of the day are under full sun at other times. Indoors, using a stationary light, some plant parts are always shaded while others are always lit. With a light in the center of the garden, plants closer to the source receive brighter light than those at the periphery. Reflectors with different shapes distribute light in varying patterns. A good quality reflector will spread the light evenly over the garden. Still, a light coming from a single stationary source leaves some areas in permanent shadow. Light movers were invented to solve these problems. The movers carry the lamp over a fixed course so that entire the garden comes directly under the light part of the time. These units are manufactured by a number of suppliers and use several innovative techniques to move the lamps. Some of them move the lamps quickly, so that the light passes over the garden in less than a minute. Other movers take 40 minutes to traverse the course. Both types improve light distribution in the garden. As a result, the plants grow at an even rate. Since the plants are not stretching in one direction to the light, they grow straighter, with more symmetry. The rotating units seem most effective in a square room, while the shuttles, which go back and forth, seem best in rectangular or odd shaped spaces. Closet cultivators have found that electrically generated light is precious so any generated is best conserved. Efficient indoor gardens must reflect back the light straying out of the perimeter. Growers cover walls which cannot be painted with flat white paint, with aluminum foil, Astrolon or mylar. This is extremely important. Any light which hits a dark surface is absorbed and converted into heat, rather than being used in the garden.
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