Lookie what I found, a pic of something planted in bag: http://www.vegetablegardener.com/item/4396/try-soil-bag-planting-for-no-dig-beds
That plant's kinda big since it's a mater, but I bet you can find lots of pics online. I started planting in bags over 30 years ago...at first with regular bags of soil upright, then later discovered that laying the "boxed" bags flat so the soil is shallow works as well while providing more surface area to plant in. My peeps laugh at my garden of bags since we have many hundreds of acres that we raise alfalfa...meh, they laugh & I'm a good tease taker, but they love to eat from what grows in them bags.
This makes since to me now. I was picturing upright. And for some reason I recognize the bag better too. LOL
That is so doable!
OMG, now what else can I plant. LOL Still time for green onions for the kitchen. hehe