I grow tomatoes, kangkong, snake beans, rocket, swiss chard and of course herbs in pots on my balcony, because I live in a flat and that's the only space I have. You can do a lot in containers :-) But, say, take a 44 gallon drum cut in half. Filled with composted manure, it's perfectly possible to grow giant 'tree' tomatoes in it or any kind of tomatoes you want. I used to do that when I owned a house, also because there were soil problems. In that case it was a mango tree wanting to poison everything underneath it. Containers have other advantages: less stooping, often less pests, etc. Zucchini will want to spread out over the edge of the tub, but that's okay. Okra isn't a huge plant and should do fine in a container. Hope I don't sound condescending; I just love helping out in gardens! I'm the local coordinator of Permaculture Blitz *permanent blush*
Tune in at the same time next week for more of bilby's balcony gardening tips.
I, too, have a large mature black walnut tree. Yes, it provides me with more nuts than I could ever eat... but its foliage and roots poison all the juglone-sensitive plants I would like to grow, such as tomatoes and cucumbers.
Can't believe this one hasn't been listed on Wordie. Once upon a time I bought black walnut fudge from a little store in Gnaw Bone, Brown County, Indiana (east of Bloomington and IU where I did grad studies) from a little old woman whose Persimmon Fudge recipe was featured in a book of vanishing American recipes. I liked the persimmon fudge too.