Hi Terrycrz,
That's some really great info from Backyard Gardener.
Your onions should have at least 12 hours of direct sun. Most leafy greens will do ok in the shadier bed, but your tomatoes, peppers and zucchini will need as much sun as you can give them.
It sounds to me that you are trying to fit too much into too small a space. You could grow the radishes between the lettuce or peppers as they harvest in about 28 days and will be finished by the time these veggies get some size on them, unless you reseed.
You don't say which tomatoes you are growing, but most need about a 2' square area, so you will only be able to fit 2 or 3 into the 6' x 3' bed. At this site you can look up many different veggies and get an idea of how much space each will need.
Explore Cornell - Home Gardening - Vegetable Growing Guides
You might want to grow the rosemary as a shrub in the garden in another place as it can get large and stay outdoors year round in your climate.
Your zucchini and melons will become large vines and one of each will take up more room then you have in each bed. You might want to build a fold away trellis to grow your vining veggies and fruit on.
Build a Garden Trellis for Vegetables, Vines and Flowers | DoItYourself.com
Often your local extension service is the best place to start. Here's some sites specific to Florida that should also be helpful.
CIR375/VH019: Organic Vegetable Gardening
Here you can find your local county extension office site and look for local info.
Local Offices - UF/IFAS Extension: Solutions for Your Life
I suspect you are in Miami-Dade. When you get there look on the left side of the page for info on gardening. If you click on 'Home Gardens and Landscapes' you will see a link for 'Florida Gardening Calendar' in the middle of the page near the top. It lists what to do by month for your region.
Local Offices - UF/IFAS Extension: Solutions for Your Life
Here's a site on what goes good with what - it's called companion planting.
-=Moonsweb.com=- Companion Planting
Newt