For the past 7 years I have grown my salad greens in large storage boxes. The picture above is from last August with the mint growing up around the boxes.
The boxes have holes drilled into the bottom and about 4 inches up the side of the box.
I used foam peanuts on the bottom to save on potting soil. I filled the rest of the container with commercial soil for containers. Every year I add a little more compost and soil to the boxes.
One year I was so busy I did not pull out all my lettuce and let it go to seed. In the spring I found that little lettuce plants came up really early in March. All I needed to do was thin them out a bit and I had wonderful greens from May thru August. I let the lettuce seed itself on purpose the last two seasons. Here is a picture I just took o with my I phone. Notice the little red and green lettuce plants. Pictures below are from other years.
Last Summer
May 2008 the Strawberries are blooming.
