Please help!

I don't want to post it again, this is the third time I've tried to get answers if you need more info please go here http://davesgarden.com/community/forums/t/877307/

How does one figure out how much room plants need in a bio-intensive planting? I thought someone on here might know since it's done a lot in containers.

I container garden on my patio and used companion planting to get the most out of my space. This link goes to a chart that shows what plants are mutually beneficial:

http://attra.ncat.org/attra-pub/complant.html

As far as plant spacing goes, I used the guide by "Square Foot Gardening". You can find that info here:

http://www.squarefootgardening.com/html/body_PlantSpacing.htm

The combination of these 2 methods has given me the ability to make the most out of my limited space. I hope this helps.

Still not quite what I'm looking for. What I want is something that says something like "if the plant is listed as needing to be planted 12" apart, you can cut that down to 6" if you are doing bio-intensive planting style."

The general opinion seems to be stick them in the ground as far apart as you want them, if they have issues thin them and if it's not full enough plant more. But, since I'll be getting the plants over the next year at least, and want to have a planned garden, that's not a lot of help. Maybe there just isn't info out there on what I'm trying to do.

Unfortunately I think you're going to have to do some trial and error. Different plants grow at different rates, and the growing conditions in your garden can impact how big and fast things grow too. Some plants you'll be able to get away with planting half the recommended distance, but others if you do that you'll probably end up having to pull some out, but since every situation is going to be a little different and every plant is different, it's hard to come up with a hard and fast rule that will work for everything.

Have you tried doing some internet research on biointensive gardening? Normally DG is a great resource, but there are always a few things that really nobody here is doing much of, so sometimes you do need to do some research outside of here to find the answers you want. I'm willing to bet if you google biointensive gardening you'll find a lot of info to help you get started.