Got to read up on that. What are the issues with onions and peas? I have the book Carrots Love Tomatoes ( which I just planted together and what got me here as I was wondering if it was Love or Hate ... I have to read it!) and saw this.
Sure 'nough, I planted onions and peas together and my guess is that 2-4 inches on all sides seems to work ;) 
The peas, what are left after the squirrels dug them up and the rabbits gnawed them off, are close to 6 ft tall. These are Sugar Snap and Tall Telephone and this is the first year that I have ever gotten to taste a fresh pea and was truly blown away ... candy! 
The onions need thinning and the beets to the right have to be planted a 3rd time thanks to the wabbits but today I hope to have closed down their buffet ;) 
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