If planting a crop other than veggies in the nightshade family (pepper, tomato, eggplant) I don't see a problem. You will want to add a bit of compost or something to return nutrients that last years crop removed.
Don't need to but a soil test wouldn't hurt. You say all grew well last year but a lot of peat and sphagnum my turn the soil a bit too acidic. I have real problems with acidic soil so use lime. Just a though.
Mike

Add compost to replace nutrients that last year's crops used. The usual method is to put a scoop (whatever that is) of compost in each square when you pull up the old plant. This doesn't necessarily happen all at once, but can be done throughout the year as you change crops. It is recommended not to grow the same plants in the same space every year, but some people do if they never had a problem with disease.

Here is a link that might be useful: What's Growing On?