I planted a few seeds this evening. In Garden #1 I planted a square each of spinach and carrots next to the garlic.
In Garden #2 I planted lettuce, celery, sugar snaps, watermelon, Old German tomato and bell pepper. I was careful to not plant the tomato and pepper too close to where I had the tomatoes last year. The watermelon seeds are left over from the watermelon that grew last year.
I forgot to update on the rain barrel. It works quite well for me. The gutter system captures less than a quarter of my roof area but even an inch of rain fills the barrel. I think I have space to add an additional barrel if I could find one on the cheap.
I purchased a planting tray to start my seeds in. This tray has 72 cells for starting seeds in. The cells are open to the main tray in the bottom so that water can flow freely throughout. As you can see, when water is added the pods expand. I have seeded several plants. I am following the directions for the tray (which includes a clear plastic cover) and am placing it in a warm place, out of direct sunlight.
I labeled each column and row so that I can keep track of what is growing where. For instance: