@Stephanie I've spent days planting dahlias, so the summer garden will benefit not only us, but our guests. My trick this year is to grow them in pots, then transfer them to permanent beds after they have started leafing out. The first batch I grew rotted in the ground because I didn't know that they should not be watered after their initial planting until the leaves pop up, so this method makes it easier to achieve success. Once they start filling in I'll add ranunculus, zinnias, coneflowers and Oriental lilies. I'd love to share photos, but your system had changed and is not very intuative, so I can't post them.
Anyone care to explain how an image is posted now?
This year I also decided to give up 2 raised vegetable beds to devote more space to a cutting garden, but I'll still grow tomatoes and lettuce, artichokes and fava. Interestingly enough, the best tip I have was found in a British gardening magazine. Since tomatoes need deep watering, they suggested cutting off the bottom of a plastic water bottle, unscrewing the cap and digging a long hole adjacent to the long tap root. Then put the bottle neck upside down into the hole, burying at least half of it. This allows you to deep water each tomato plant without splashing mud onto the leaves, which could cause several fungal diseases to attack your tomato and limit the life of the plant as well as your season for growing tomatoes. Using bark chips under tomato plants will also help to avoid soil born fungal diseases. Adding fertilizer is easy since you can just add it to the upside down pottle and fill with water from the garden hose.
Speaking of lettuce, I was in chicago a few weeks ago and the city really puts on flower displays in Spring. I kept photographing flower beds and boxes and noticed that the city gardeners were filling in planter boxes of flowers with several vegetables, including Lollo Rosso lettuce and Belgian endive. It looked amazing. Unfortunately I can't post that photo either.