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Stevens M. How to grow Marijuana indoors under lights USA 1975

This book was published in 1975, and has been available in the UK since the late 70s. A later version "Indoor Marijuana Cultivation" published in 1979. There are 75 pages of text, diagrams and photographs, with 22 pages of advertisements for growing equipment and an order form.

Disclaimer: This states that cultivation of marijuana is illegal in the USA and stating "This book is in no way intended to encourage or promote the illegal cultivation of Marijuana. ... it is the authorĂs recommendation that you read this book for your own personal information". The author states that the information can be applied to growing house plants, vegetables and tropical varieties.

Chapter 1 (introduction) includes information about germinating seeds (gleaned from illicit marijuana) in paper towels, planting them into jiffy pots (peat). The author recommends loose sandy soil types with added vermiculite or pumice for aeration and water-retention, with a neutral pH.

Chapter 2 (containers) advises starting seedlings in "Jiffy pots", and recommends a final pot with a capacity of 3 gallons, or a pot 11" wide and 13" deep.

Chapter 3 (your plantĂs environment) gives advice on watering (every 3-4 days) maintaining air temperature (70 to 80o F), and advising soil heating for outdoor or cold environments. Advises proprietary fertilisers (Ra-Pid-Gro) - 23% nitrogen, 19% phosphorus and 17% potash, or the use of earthworms. Advises on dealing with pests - animals, insects, disease and thieves, with detail in spider-mites and aphids.

Chapter 4 (growing indoors with lights) - Advises use of gro-lux (fluorescent tubes e.g. aquarium lights) which provide correct spectrum. States advantage of indoor growing is quality, a controlled environment, and freedom from many pests. Gro-lux lights are discussed in detail, with an light output chart for colour bands from different types of light. Advised to place lights 8 to 18 inches from plants. Discusses advantages of Metal Halide lights, with much higher output and increased quality and growth. Discusses adjusting the day length to promote flowering (information inaccurate indicating flowering possible with 18 hours of light), once plants are old enough - and that older plants make better buds. Discusses ventilation, dehumidification, pruning.

Chapter 5 (if your plants are not feeling up to par) discusses the causes of symptoms of ill-health, diseases, pests and inaccurate feeding or watering.

Chapter 6 (is it a boy or a girl) advises (with photographs) how to distinguish the sexes in the early stages of flowering.

Chapter 7 (two weeks before harvesting) advises the grower to cease watering the plants at this stage, to raise the room temperature and increase the light intensity to maximise the amount of resins in the flowering tops. Advises on harvesting, drying and curing cannabis.

Chapter 8 (additional ideas for the connoisseur) gives advice on more advanced techniques such as additional CO2 from bottles or dry ice, colchicine (to cause changes in the chromosomal structure - a crude form of genetic engineering). There are a few paragraphs on growing outdoors, problems with chlorinated water, clean, smoke-free air, and use of reflective foil in grow-rooms.

Chapter 9 (planting by the moon) advises planting seeds or taking cuttings during the waxing moon, and pest control, pruning, transplanting and harvesting during the waning moon.

Appendix A gives advice on hanging and mounting gro-lux lighting fixtures, including (at p69) cupboards split into two separate growing areas..

Appendix B gives advice on taking, propagating and rooting cuttings (allowing cultivation of all-female plants).

The text concludes with an identification table of insect pests, and how to deal with them.

The book then contains a catalogue of growing equipment, including metal halide and gro-lux bulbs, pulleys, timers, scales, fertilisers, pH testing kits, fans, hydroponic systems and a list of other publications. There is an order form at the end.

Comment: This book is written in a simple, understandable style with many diagrams and limited text. The information is of intermediate level, with some complex issues discussed and explained to the novice grower. The book refers to high-intensity lights and carries advertisements for equipment and hydroponic systems, indicating use of such systems to be long-established, although his general recommendation is for organic soil. His diagram on page 69 is very similar in concept to the Kushti Box, in Tricameral Sinsemilla.

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