A lot of folks are confused by the complexities of greenhouse growing. Well, if an unsure understanding of the many published "rules and regulations" is keeping you from trying greenhouse cultivation, justforget them! All you really have to do to turn your plant palace into a dynamic package of productivity is to put real soil in the pots and benches; give your greenery plenty of light, air, and space; administer water wisely; and feed your hungry charges with nourishing manure "tea."
Besides — by doing without the often-recommended chemical fertilizers, sterile soil mixes, sprays, fumigants, systemics, and such — you'll find that you have a good bit of spare cash left for more essential items ... such as plants and pots. You'll also discover that disease and insect infestations, weak growth, and subnormal performance are (more likely than not) merely symptoms of improper culture, which shouldn't trouble the greenhouse gardener who zeroes in on the basics!