  1. List and describe the different types of greenhouses on a quiz with 85 % accuracy.  2. List common framing materials used in greenhouses on a quiz with 90% accuracy.  3. Compare basic types of greenhouse coverings on a quiz with 80% accuracy.  4. Describe the uses of cold frames on a quiz with 80% accuracy. Objectives

  Why are there different types of greenhouses?  Why do we need to know the different types of greenhouses?  Why are there different materials used to frame greenhouses?  Why are there different materials used to cover greenhouses?  Why do we need to understand what a cold frame or a hotbed is? Reasons To Learn

  What are some different styles of greenhouses?  What are some factors to consider when choosing a greenhouse?  What are some factors in choosing the framing material for a greenhouse?  What is glazing?  What is a cold frame?  What is a hotbed? Questions To Answer

 Lean-to Greenhouse  Advantages  Cheapest  Easier Instillation  More Obtainable  Space  Disadvantage  Limit Sunlight  Limited Plant Growth  Difficult to maintain temp  Limited Ventilation

 Even Span  Advantages  Common  Easy to find tables  Easy to heat and ventilate  Can add on to  Disadvantages  Expensive  More space needed

 Uneven Span  Advantages  Can be built on hill sides  If constructed well can cut energy costs  Disadvantages  Difficult to find equipment for  Difficult to add on to

 Quonset  Advantage  Easier installation  Low cost because of covering  Disadvantage  Appearance for home gardener  Allows for only inexpensive cover

 Gothic Arch  Advantages  Inexpensive  Is good for shedding snow  More attractive  Disadvantages  Less head room  More difficult to build than Quonset

 Ridge and Furrow  Advantages  Large capacity  Lower energy cost  Ability to diversify plants  Disadvantages  Area needed to build  Cost of building

  Get into your groups.  Each group needs a poster board.  Discuss with your group what type of greenhouse your group wants to design.  Each group needs choose at least three plants from their lists.  After you choose draw an exterior view of your greenhouse on one side of the poster board.  The other side draw the floor plan of the greenhouse.  Also draw out your tables on the floor plan.  As a group write in a few paragraphs what choices you made and why. Greenhouse Project

 Frame types Wood  Good  Attractive  Traditional  Bad  Expensive  Easily rotted  Heavy Steel  Good  Strong  Inexpensive compared to aluminum or alloys  Can use galvanized  Bad  Very heavy  Rusts

 Frame Types cont. Aluminum Alloys  Good  Non corrosive  Low maintenance  Bad  Expensive  Lower retention of heat

 Greenhouse Glazing  Polyethylene  Most common  Cheapest form of cover  Glass  Best light transmission  Most expensive  Rigid structure sheets  Expensive  High impact resistant  Weather resistant

 Cold Frame vs. Hot Bed  Both used to protect small plants and seed protected from the weather.  Cold frame uses only sunlight for heat  Hot bed uses other sources for heat as well as sunlight

  Get into your groups and discuss what type of frame you need for greenhouse.  Also decide what type of glazing that you are going to use.  As a group write a couple of paragraphs about what choices that you made and why you made them. Greenhouse Project