I am wanting to plant a garden for my wife and I. I would like to use the majority of the garden for salsa. I am using raised beds 4x4 feet in size. I just can't find anywhere that says how many plants I should be using. I have tomato, peper, jalapeno, and possibly onions to plant. I will be using 2 of the 4x4 beds. Any ideas on number of plants?