I am trying to figure out just how deep I have to make the containers for my garden. According to some people and based on the container gardens being sold by some companies and what I have read, 6 inches is enough. But what if 4 inches is enough for some plants? How about 5 1/2 inches? What if it needs to be 9 inches.
I am making boxes from some recycled materials and successfully growing plants in them but I just don't know if they could be growing better with taller containers. Or maybe that would just be a waste of soil and materials.
I found a link for a book written in 1927 on root development at a site http://www.soilandhealth.org. A plethora of old books available in their library on soil and gardening. I am going to have to go back and look at what is there when I have more time.
In my travels I found this link to a PDF from Perdue University's Extention Service on container gardening. Seems like they think 6 inches is about all that is needed for raised beds. I guess I will stay with six inches for most stuff now.
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