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Container-Free Balcony Gardening
From my grandmother:
I thought you might be interested in growing cherry tomatoes in a bag of potting mix. Before lying bag down flat put a few small holes on one side for drainage. Then turn over to the other side and cut holes big enough to put a plant in each. You will need to have some way to put stakes in for them to climb up.
I think she has her bags lying on the ground, but I bet you could keep the bags of potting mix upright, too (with some holes poked in the bottle for drainage). Cheaper than buying pots.
willem van cotthem said,
Excellent idea. Recently, I developed some plans to use plastic bags, as a sort of very cheap containers, in a school garden project in Algeria. I believe we can educate pupils and students to “recycle” those plastic bags (and bottles) by growing vegetables, ornamental plants and even fruit trees in them. Instead of throwing them away and pollute our environment, they can have a lot of interesting activities and fun. I will report on the results of our initiatives with plastic bags and bottles on my blog
Prof. Dr. Willem Van Cotthem