I kept thinking how to sow on such tower next growing season, as the planting areas are vertical and small (no matter the chicken wire or hardware cloth), sowing tiny seeds will be comparatively difficult.
I had been wondering about that. When seeds sprout, the tops usually try to grow up, which could be a problem if they are planted in the side of the tower. But I also know they usually grow toward light, so maybe that would be enough to help them grow out the side instead of going straight up and dying in the middle of the dirt.