I agree with Dave and would actually recommend 1 cuke per earth box if possible. I have personal experience with them and sell them at my nursery. The box really does'nt hold as much soil as it may appear and with vigorous plants like cukes and tomatos you will find that before the season is even half over the plants will be root bound and have exhausted soil nutrients. You will also have to fill the water resevoir several times a day in the heat of summer. Stick with one plant per box if you can it will be much more productive.

thanks digdirt, before I replied Amy, following digdirt's post I did a search under the username you used for the OP, as although I have great respect for digdirt I alway's check before adding and then actually didn't add until I saw Curt's but having read through your post's, I found his comment funny. under your OP name all on container gardening forum, you posted June 27 09 "what soil mix to use in container gardening" July 8 09 "soil mix to use in container gardening", and March 3rd 10 "need 'soil' recipy for container garden" on the 3rd of July 09 SQ foot garden forum "what type of soil in a square foot box" in less than 9 months, 4 almost identical questions out of only 100 (and you do it on other subjects), either you are on the wind up, you can't be bothered to look up you old replies, or you are suffering from Short term memory loss, (So if you are genuine, start using the search or google search which is better), if you want I will post your search list's for you too see, or you can go away quietly and let us enjoy our knowledge (or lack of in my case) finding and helping. If it hadn't been someone of Digdirt's expertise and long standing going off at you, I would have possibly not even investigated, as it is I did....and believe me Amy, I am not perfect, I have been an arse on here!(big time!) but the frequent advisers on here are forgiving and patient beyond belief, given that they do it, in their own time, to help us idiot's, trying to learn, and asking the same question's day in day out, because as much as you search your question isn't quite asked... Sorry I was getting ranty! but if you are genuine, do a search before asking! especially under your own name! actually I am feeling generous, here's you search list, obviously I haven't access to your e-mail. I mean seriously! 2 turnip spacing questions?? in less than 2 weeks, the gig is up! you had a long run, well done, clap, clap, no encore thanks. Here is a link that might be useful: your post's all five pages, look at the main themes

I would have to disagree with the spacing suggested by mauirose. Three square feet for a zucchini plant is most likely way too tight. I have a zucchini plant in my yard that is taking up more than double that room. I think that growing zucchini in containers is an excellent idea. For one thing, if the plant gets to be larger than planned, you can move the container so that the plant has enough room without having to transplant or prune anything. Having a round, bushy habit, zucchini also looks much better in a whiskey barrel than it would mixed in with other plants. It is a beautiful plant and I will in fact plant one in my flowerbed as a landscape plant next year. Finally, using containers for zucchini will help a great deal in isolating it in a way that you can better protect it against the nasty cucumber beetle, squash bug and squash vine borer, not to mention aphids. It is much easier to drape protective row covers around a container than it is around plants in a row or a raised bed. Just don't forget to hand pollinate the plant--under cover, there will be no pollinators, so you will only get fruit if you sit in for the pollinators.

I've routinely used those "large" "tomato" cages for my Ichibans. Really can't use them individually for tomatoes. They work great for those eggplants. Though my Ichibans aren't in containers. Mine reach the top ring, though eggplants aren't quite up at that level. Makes sense to ease the fruits to hang over the rims, but I frankly didn't bother with that a lot, and everything was fine. The rings are pretty far apart, so it isn't always convenient to do that. The plants are pretty strong, and can hold the fruit without support. But with a few fruit hanging over the sides, the cages mainly serve to confine the plants. I've switched over to Ping Tung this year, because Ichibans are on their way out. But I have them in those cages as well. They like sun, and they like heat. Seems like either of your location choices would work OK.