Marijuana Horticulture: The Indoor/Outdoor Medical Grower's Bible

top. You can make cloches out of wax paper, glass, and jars, or buy them. Commercial units are made of rigid transparent plastic or heavy-duty wax paper. They are easy to use and stack well for storage.
    The Wall O’ Water is a plant lifesaver. It is a water-filled teepee which uses the heat-emitting properties of water to shield plants from excess heat and keep them warm in the cold. It holds three gallons (11.5 L) of water and fits over the plant. During the day, the water absorbs the heat of the sun, moderating the temperature inside the teepee. At night, as the air temperature drops, the water releases its heat, keeping the plant comfortable. The Wall O’ Water does its best work in the spring when there is still a chance of freezing. As water freezes, it releases more heat into the teepee and can protect plants down to 20°F (-7°C).
    Covers protect early plants and can help produce a spring crop. The most uncomplicated cover is a sheet or blanket spread over the plant and held down with stones or soil. A low wattage electric light bulb carefully placed under the cover will raise the temperature 10-15°F (5.5-8°C) above that of the rest of the garden. Be very careful that the light bulb does not touch any part of the cover, or it may start a fire. Products such as Agronet™ and Reemay™ are spun-fiber with sun-protection properties that can be used as covers in place of the sheet or blanket.
    Row tunnels can be made of clear corrugated fiberglass that is bent into an arch and secured over the garden. Commercial row covers come in many sizes from large enough for dwarf fruit trees to smaller units for pepper plants and rose bushes. Those made with polypropylene will protect plants down to 25°F (-5°C).

Chapter EIGHT
CASE STUDY & GARDEN CALENDAR

    Inspect plants carefully every day.

Case Study - Energy Efficient Organic Sea of Green
     
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Growing Statistics
    Yield 1 : 8.4 pounds (3.8 kg) in ten weeks, initial grow in room half the size of other grows.
    Yield 2: 27.6 pounds (12.5 kg) in nine weeks for second grow.
    Yield 3: 30.2 pounds (13.7 kg) in nine weeks for third grow.
    Cost: First Crop / Initial setup + power: USD $5647 (Eur $4500) - USD $672 per pound (Eur $1184 per kg)
    Second Crop / Improvements + power: USD $8220 (Eur $6550) - USD $298 per pound (Eur $524 per kg)
    Third Crop / Reap the rewards: USD $1882 (Eur $1500) - USD $62 per pound (Eur $106 per kg)
    Space: First grow: 16’ 5” × 7’ 10” (5 × 2.4 m), Second and third grows: 33’ × 7’ 10” (10 × 2.4 m)
    Watts: First grow - 6000 watts, second and third grows - 8400 watts.
    Cloning: 100 clones (first crop) and 400 clones (second and third crops) purchased from an outside source and ready for planting. Clones were purchased for USD $3.15 each (Eur $2.50 each). The strain supplied was Power Plant.
    Vegetative: First crop - 100 clones were planted directly into flowering room and given 18 hours of light per day for a period of 14 days. For the second and third crops, 400 clones were used. Because the number of plants grown per square meter was doubled, only seven days of vegetative growth were needed pre-flowering.
    Flowering: The young plants, when acclimatized to their new home and growing well, were switched to a 12-hour light cycle for eight weeks.
    Harvest: Mature plants reached an average height of 23 inches (60 cm) with multiple branches.
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The First Crop
    Nigel and Terry lived together in Central London and worked for the same large British company. When both were offered a transfer to a new firm in Holland, they jumped at the chance. The new company was in the west, near the coast, and in close proximity to some picturesque rural districts. They rented a house in the countryside where they could enjoy the solitude and reduce the stress associated with corporate life.
    The house they rented was on a large piece of land, not in direct view of any neighbors. Near the house was a big shed once used to service farm equipment. It had power, water, and a functioning toilet and shower. Interesting?
    After settling in at work and making the house comfortable, Nigel and Terry got to thinking. “That shed’s just sitting there empty, and wouldn’t it be just perfect for a hydro setup?” As it turned out, the property they rented was owned by an elderly woman who lived in Belgium. The rent was paid to a real estate agent in town, and no neighbors had even spoken to them in the six weeks since they moved in, so they figured