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