I thought the shower rod design http://our.windowfarms.org/2011/01/07/my-manhattan-windowfarm/ by Dave, @dhult was brilliant so I “borrowed” the idea for my next one. I had an old shower rod laying around and it fits perfectly in my bay window. My other two WFs use 2L pop bottles and so does this one. The 4″ net pot fits in well into the 2L bottle. My Home Depot had the ground clamp ($1.46), however it did not have that style pipe hanger and neither did the Menards store. I had to improvise. I used a 4″-5″ adjustable hose clamp ($1.49) in its place and drilled a hole in it to connect it to the ground clamp.
The other change that is different than my others is that I drilled a 1.5″ hole in the top of the bottles in stead of the 1″. The 1″ allowed the bottles to be screwed together for some additional support, but the extra support is not needed here. The 1.5″ hole allows the neck of the upper bottle to fit deeper into the lower bottle making the column a little more compact and easier to disassemble.
I still have to cover the bottles and resevoir to keep out the light, but I have to figure out what to plant next. Overall, I like this design more than my last two since it has the advantage of easily taking the resevoir out.
1/18/2011 Update – Here is a video of the pump in action. http://www.youtube.com/watch?v=oKjkFIcBLj4 This is the same “Tee” style pump I have been using on all my WFs. There’s a good picture of it in this post. http://our.windowfarms.org/2010/12/04/strawberries-9-months-new-wf-first-snow-of-the-year/ The water does go up and around the rod pretty well and its fun to watch. The total lift is only 42 inches. Later on when it is full of algae it will be less interesting and I’ll probably straighten it out then.