Step 1: Materials List
So far it has been a constant 58 degrees inside the greenhouse. I have started only cold friendly plants. It likely gets a bit chillier when the lights go off.
Many times you can find some of what you need for free on freecyle.org, reyooz.com, thinggo.com or trusty craigslist.org. A thrift store is another good place to check for some of these items.
Shelf with 5 shelves $50.00
8 LED grow light panels $240.00
Roll of sheet plastic $12.00
2 Power strips $10.00
2 Timers $14.00
1 Thermometer $ 2.50
Total: About 331.50 (plus tax)
Time of useful life. The only element I expect not to last for at least 10 years are the LED panels.
Things I had on hand:
some lattice panel to
keep the barn cats out
- LEDWholesalers on ebay.com 2 orders - 900 LED Grow light 4 Red + Blue Hydroponic Lamp Panels. They have a few negative comments but for the most part they get 5 stars.
- My shelf was a bargain apparently. I cant find these very cheap online.
- Make sure the timers are the grounded type (three prong.)
- The power strips plug into the timers.
- The LED panels go into the power strips.
Step 2: Build Shelf
Step 3: Test LED Panels
Step 4: Tie LED Panels to the Undersides of the Shelves
Step 5: Attach Powerstrips to Shelves
Step 6: Set Timers
Step 7: Plug LED Panels Into Power Strips
Step 8: Plug Power Strips
Step 9: Covering the Shelf
Use duct tap to close gaps between bubble wrap panels.
Double the bubblewrap if you want more insulation.
Do not seal the thing up tightly. You want some air in there. Stay away from PVC plastics.
Step 10: Use Sheet Plastic for Outer Walls
Wrap about 8 inches of the plastic sheeting from the side to the front.
Staple the long sheets of plastic also from the top of the shelf. Note: I used the plastic folded over triple layered.
Use duct tape to close gaps in plastic sheet panels.
Do not try to 'seal' the thing up. You want air flow.
Stay away from PVC based plastics. They may offgas.
Step 11: Make a Door
Use the binder clip to hold the door to the side when you want access to the shelves.
Step 12: Insulate
Step 13: Attach Thermometer
Step 14: Fill With Trays and Seedlings
You might want to use shoe boxes or bricks to allow you to get the seedlings closer to the lights when they are younger.
So far we have seen a regular temperature of 58 degrees F, inside the enclosure. Pretty good considering it's 30 degrees most days!