We were having trouble finding the right pump, so we decided to water manually.If the pump makes it cost prohibitive, this could work for you, it costs less than $50.
We give each column about a litre of water every 4 days. It’s only been a few weeks, but the peppers are flowering and everything is growing.
Check out the full blog: http://ebw.evergreen.ca/blog/entry/window-farms/
I’ll post the plans soon.