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

can cause moderate eye injury and is harmful if inhaled or absorbed through the skin.
Isopentyl adenine (IPA)
    Isopentyl adenine is a naturally occurring cytokinin which is synthetically manufactured as benzylaminopurine (BAP) for use in commercial bio-stimulants such as Rush Foliar XCell Veg and Xcell Bloom.
    Xcell Veg acts in the growth stage of the plant by improving the transport of nutrients. Glycine betaine in the solution provides a barrier to environmental stress. The product is used as part of an established feeding program. It can be sprayed on, just before turning off the lights, or used as a soak in the growing medium.
    Xcell Bloom also has anti-stress properties and improves nutrient transport. It stimulates flowering, reduces plant growth time, and increases cell division and lateral root growth. Flowers are larger, heavier, and have enhanced color.
    Both products can be used in hydroponic or soil mediums.
Rhizobium
    Rhizobium is the name given to a group of bacteria which infect the roots of legumes and create nodules that act in symbiosis with the plant. Rhizobia are host-specific and will not work with all crops. With the proper host, however, Rhizobia improve nitrogen fixation while simultaneously providing an additional source of nitrogen.
    Rhizobium is most effective when added to irrigation, but it can be added to a drip or directly to the soil. Benefits will depend on proper crop/Rhizobium match. Re-inoculation is recommended every three to five years.
Spray-n-grow
    Spray-N-Grow is a brand name vitamin and nutrient solution that includes barium and zinc. It is sprayed on plants to provide micronutrients through the foliage, a technique said to be more effective than root nutrition. Plants will grow faster, bloom earlier and more prolifically, have larger roots, and have a higher vitamin, mineral, and sugar content.
    Because it is absorbed through the leaves, Spray-N-Grow works quickly, in as little as seven to thirty days. Tender plants will realize benefits faster than woody plants. Spray-N-Grow can be used in any type of growing medium as a complement to the established feeding regimen. It is non-chemical and safe for people and pets.
Sugar
    Molasses, honey, and other sugars are said to increase soil microbials, enhance regrowth, and make the plant’s use of nitrogen more effective. Molasses will raise the energy level of the plant and acts as a mild natural fungicide. Molasses is the “secret ingredient” in many organic fertilizers.
Trichoderma (002/003)
    Trichoderma are fungi that colonize in the root zone, crowding out negative fungi and microorganisms while stimulating root development and resistance to environmental stress. The result is a more vibrant, stronger plant.
    Canna was the first company in the indoor grow industry to sell a commercial product as a growth-promoter which contains Trichoderma fungi. Colorado State University studies indicate that Promot Plus, a product containing Trichoderma, is effective in suppressing pathogenic fungi that cause rot in the seeds, roots, and stems.
    The product can be applied to seeds, used during transplanting, mixed with liquid fertilizer or via drip irrigation and/or watered in. Canna’s Trichoderma contains living organisms that will reproduce after application, so a small amount will do a lot. It is nontoxic and environmentally safe.
Zeatin
    Zeatin is one of the cytokinin growth hormones. Upon germination, zeatin moves from the endosperm to the root tip where it stimulates mitosis.

Adding sugar during the last 6 weeks augmented harvest weight of the bud on the right by 20 percent.

Chapter TWELVE
HYDROPONIC GARDENING

    This Swiss hydroponic setup is simple, efficient, and economical.
Introduction
    Hydroponics is the science of growing plants without soil, most often in a soilless mix. In fact, many growers are already cultivating hydroponically. Cultivating clones in rockwool, peat moss, and coconut fiber is growing hydroponically. Growing mature plants in soilless Sunshine Mix or Terra-Lite, even when watered by hand, is hydroponic gardening. With hydroponics, nutrient uptake and grow medium oxygen content can be controlled easily. Manage these two factors, along with a few other requirements, to grow a bumper crop of buds with every harvest.
    The inert soilless hydroponic medium contains essentially no nutrients. All the nutrients are supplied via the nutrient solution-fertilizer diluted in water. This solution passes over or floods