I’ve completed the construction of my Windowfarm, so in the grand tradition of the Windowfarms community I’d thought I’d share some photos and my tweaked design
Materials
1 x 2 liter soda bottle
5 x 1.5 liter bottles
5 x 8” wooden dowels
1 x 4” metal pipe holder
1 x 11 ft large tubing
1 x 3 gallon bucket
11 ft PCV pipe
1 x 10 lb bag of cement
A bunch of zip ties
5 x 3” grow cups
4 x 4” aquarium tubing
1 x aquarium pump
1 x T connector
1 x silicon glue from Home Depot
1 x bicycle inner tube presta valve
Some other stuff I missed
Posts read (where ideas were taken from)
Reservoir and t-lift system (no needles): http://our.windowfarms.org/2011/04/16/the-science-of-airlift-plug-flow-is-the-way-to-go/
Lighting: http://our.windowfarms.org/2010/04/15/super-simple-light-system/
PCV Pipe Setup: I can’t find the link but I do remember I watched a video and a bunch of Swedish/Dutch/Norwegian/German guys showing off their setup in their greenhouse. There are the ones that gave me the idea of inserting wooden dowels through the bottles to support them on the PVC pipe.
Lessons Learned
1. When cutting bottle holes (which dowel is put through to mount to PVC pipe) make sure that you don’t place them in such a way where you block the bottle cap of the bottle above it. If you do the water (without the aquarium tubing) will run onto the wooden dowel, into the hole in the PVC pipe and down into your bucket and/or floor
2. Don’t skimp on the hole saw drill bit which puts the holes in the bottom of the 1.5 liter plastic containers. You’ll slice your hand off (or come close) with a razor.
3. Let the silicone gel that you apply dry overnight prior to using it.
4. You can use larger tubing to encase the smaller tubing with plumber’s tape and silicone gel to stop leakage.
5. Prior to building be sure and plant your seeds in rockwool, or whatever medium you use so that when you are done with the delivery system you can transplant right away.
6. Be sure and secure you pipe to the celling so that it does not fall over when weight is added (as shown in the picture).
7. When drilling holes in the PVC be sure and drill perpendicular to the pipe (mine are a little off which causes the bottles to be off keel).
Next Steps
Repeat timer
I’m waiting on my timer to show up from Amazon so that I can make a repeat timer
http://our.windowfarms.org/2011/09/13/35min-repeat-timer/comment-page-1/#comment-6486
Grow Lights
I also have to mount the final light to my hanging light system and make sure that they are close enough to each of the plants to have a benefit. I wanted to make my own reflectors (which I did out of soda cans on this site) but they get way too hot for comfort so I’m looking for an alternate approach.
Transplant Plants Grown From Seeds / Cutting From Garden
I have already planted seeds (after soaking them overnight) and they have really grown. I’ve used one of the lights on a different extension cord and it sure does make a difference (they’ve sprouted already) and also harvested some mint from my outdoor garden which I plan on putting in my garden as well.
As you can see from the photos the system worked out pretty well. If you have any suggestions to make this design better please feel free!
Pump
The petco pump that I bought for $20 is quite loud so I think I’m going to get a smaller $10 pump and see if it will pump the water up – quieter.
Entire Setup

Base

Top Secured to Ceiling

Reservoir (setup for easy removal and cleanup - just unwind the grow wire and pull out)

Single Bottle With Dowels

My Grow Setup

November 17, 2011 Update
Here is an update of my windowfarm

setup

mint

chives

basil

Basil

Reservoir using presta valve method with 2 metal, 2 neoprene washers and two nuts (and silicone gel)