All Season Green House

So for this project I am going to be building a green house that I can grow in all year.  It will be heated and cooled with geothermal air.  There Will be a blower that will turn on if the temperature drops below 50 deg or goes above 90 deg…. I may change this depending on how it works.

This project is inspired from David Gillmore (LDSPrepper on youtube).  However I could not find any directions for his, so I am going to post the full project step by step, including all costs.  This page will be updated as the project progresses, so check back often.


Step 1  (dig a trench) ($30)

The trench needs to be able to fit 1 foot of 4" drain pipe for every 10 square feet of green house area (it can be a little less than that if you have the back of the greenhouse as a retaining wall with dirt behind it).  My greenhouse will be 40 feet long by 15 or 20 feet wide (I have not decited for sure).  So my trench is 60 feet long by 8 feet wide, and I dug it with a skid steer.  It would be much faster to dig it with a trackhoe.  You also could probably go deeper and do layers of pipe, but I ran into water at about 6 feet so I stopped there.  I plan to add 500 feet of 4" drain pipe (two rolls of 240 foot pip).



Cost so far for me 10 gallons of off road diesel @ around $3 per gallon or $30.  This will probably be more if you hire a trackhoe to dig it for you.


Step 2 (Bury Pipe under ground) ($438)

I put 500 feet of drain pipe in my 6' deep trench.  Cost:  $408 + another $30 in diesel.


Step 3 (Footings and Foundation) ($3000)

This step is optional, but since my greenhouse is on a sidehill, it makes sense to use the back wall as a retaining wall.  And the Footings provide strength.






Step 4 (Frame and grow boxes)

In this step we will build walls,putting in weed barrier, sand, grow boxes and supports for pvc pipe and plants.

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Step 5  Finish walls insulation, stucco, add plastic, and electrical

Ok, this is a large step, but it is now completed.  So far it is working great, now we will see if anything will grow in it.


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2 comments on “All Season Green House
  1. Ron says:

    That is really nice work. I appreciate you documenting the process of the build and I'm looking forward to seeing it as your plants grow. If you don't mind sharing, what was your total cost to build this? What state are you in?

    Thanks again.

    • David says:

      Total cost was about $4500 with most of the cost being the cement work.  I am in Idaho, and thing are growing really well, even though it is getting down below zero at night.  The warm weather items like tomatoes, and corn are still alive, but not producing much, but the cold weather stuff is doing great.  We have been eating some lettuce, and the peas are growing like weeds…. I will post some pictures soon.


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