Hi everyone, I'll be starting my first sfg this year. I'm only doing one 4x4 to get my feet wet. I've got all but two squares accounted for and wanted some suggestions. I'm in cincinnati and the garden will mainly be for me, my wife, and two year old son. I'm trying to avoid anything viney, especially hard to grow, or requires more than one square. I'm not opposed to repeating something that I've already used. Any suggestions are appreciated.

Here is what I have so far...
2 squares lettuce (mixed varietys)
2 squares spinach (additional question below)
2 squares tomato
1 square radish
1 square chard
1 square kale
1 square beets
1 square carrot
1 square bell pepper
1 square jalape�o
1 square basil

As far as I can tell, my last harvest of spinach will be sometime in June, until I can plant again in fall. Any suggestions for something to fill those squares in the middle of summer

Thanks in advance everyone,
Jeff