This year, we flat ran out of garden bed space for ALL of our onions. We planted red, white and yellow onion sets, as well as plenty of the Walla Walla Sweet starts. When all was said and done we still had QUITE A FEW onion starts left and no where to put them!
If this works, we could have just solved our problem! Growing onions vertically in "potato straw towers". Who would have guessed.
People have been asking us how we plan on watering this, and my answer is...water it the same way you would a potato tower. (whatever that way may be)
We live in the pacific northwest, and so far we haven't had to do much watering. By the time the soil starts to dry out, we get a rainy day and it soaks the soil good to right where it should be. I'm noticing that these towers are acting as a sort of "hugelkultur". (...meaning the soil actually stays quite moist, even in the center of the tower!)