It makes no sense. A bean tower would be for a plant that either vines or has larger branches. What they meant by "spinach" was probably Malabar Spinach, which is a very different plant from normal spinach.

Unfortunately I haven't really received an answer to my question. I plan to space them how far apart each plant should be spaced. OK. I would prefer to use a window box, so however many gallons the thing has to be to plant 4 green bean plants without overcrowding them, please specify the dimensions of the window box and what size it has to be in gallons. 6" deep, 6" long and 6" wide. I assume since I'll be planting 4 bush green bean plants and this is how many I want in a container without overcrowding them after I thin them, that I should plant double the amount of seeds with the number of plants I plan to grow since I'll be thinning them out to the strongest plants later? First, the idea of thinning to leave just the strongest plants is silly. What criteria determines which plant is strongest? Sometimes the little weaklings go on to do impressive things once they reach their stride, and the rapid growers peter out and become weak, but I digress. If you will only be planting 4 bush bean plants it isn't really worth your time. You will, at best, get 1-2 light side meals from that amount. Bush beans are usually planted with 3-6" spacing. Root system crowding/competition is pretty much never a limiting factor for them, instead sunlight exposure is. If you plant them too densely the ones in the middle shaded by the sunny side ones become the primary limiting factor. In a container you have the luxury of rotating it for sun exposure so you can plant a little more densely than in the ground. In a trough style container you can go even more dense since the mass of leaves is only as wide and the narrow container. If it were me and I was using a container 30" long by 6" wide by 6" deep I would place 20 bush bean plants into that space. That's 3" per plant. I would also fertilize with a 3:1:2 ratio fertilizer such as Miracle Grow 24-8-16. Don't count on the myth of beans/legumes using atmospheric nitrogen when growing in containers. Heck, half the time you can't even count on it when growing in the ground. With a trough shaped container this amounts to 2 rows of beans and I would rotate the container every day or every other day to get both sides adequate light.

I would skip the corn, given the lack or room. At two ears per stalk (at best) you really are not talking about much. Around here, I can buy 40 ears of corn for about $25, less if I go to a Farmer's Market of discount produce store in the middle of summer. All my life, I grew bush beans because that's what dad did. Last year, I tried pole beans. Only had one 10' row but I was getting at least a pint per day before the drought/heat wave hit, and the beans were not in full production. The neat thing about the beans is that you could plant two rows down the middle and then a row of bush beans on the sides. Plus, toward late summer, you can plant sugar snap peas to take the place of beans. Use the room for the corn to plant carrots (I grew them in the ground with just enough room to walk - toe-to-heel - between them. Ditto for onions and beets. Plus have room for a row of herbs. If you plan on growing tomatoes or peppers, you can grow lettuce or chard between the plants. The bottom line: if you have limited space, analyze what veggies you like to eat, if they can be preserved and what it would cost you to buy them at the store or market. Use succession planting and interplanting to turn 24 sq. ft. into 144. Mike

Dave, Thanks! I've raised them for decades but always outdoors and never really gave it much thought. Mike