Types of Greenhouses
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Transcript of Types of Greenhouses
Types of Greenhouses
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
Frame typesWood
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
Get into your groups. Each group needs a poster board. Discuss with your group what type of
greenhouse your group wants to desgin Each group needs choose
Greenhouse Project
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