Brief Detour - as regular readers here likely remember, Phaedre's efforts inspired me to make a Chicken Tower of my own, with resources I had on hand. As my climate is hotter, and sometimes much drier, I built a larger diameter (about 3' around), squater tower (about 3' tall) out of step in metal stakes and chicken wire, thinking the larger center would help to keep it from drying out so quickly, and also keep it from being washed away during persistent rainfal periods.
So...
1 - the chicken wire is not going to last - I really should use a piece of fencing, as Phaedre did, and T Posts. This will get me a season at best, by Spring, I expect to rebuild it better.
2 - while the larger size did help with days of constant rains, more than 2" per week, sometimes more than an inch in an hour, we've now been five days w/o rain, and its starting to show - the new sprouts are clearly stressed. I dog a hole in the middle, set a plastic 5 gal bucket into it, with holes drilled in the side, near the bottom, about 1/4" in dia. So I can now add 5 gal of water that will soak into the column without washing out new growth or simply running off the dry sandy top. Will let you know how its going in another week or so - we are expecting no rain for at least another 8-10 days.
...and back to the main event!
Thanks for that update.
Here at the northern end of your climate zone I tried growing potatoes in a circle of fence one year and could NOT keep the things watered. A 5-gallon bucket might be better than the hunk of PVC pipe I had (I forget the diameter).