to be very invasive! I don't know how much room you have?

What I do, is put in easy to care for things, that bloom at different times.
Then I let them grow all together, and I have flowers most of the summer.
(perennials)

I love day lilies...I have several types, and they all bloom at different times.
Also daisies and black eyed susans are trouble free. For fall I have upright
Sedums. But my favorite lately has been the Lychnis Coronaria. Easy from seed.
http://www.google.com/imgres?imgurl=...&ct=image&cd=3
This is very hardy, can stand dry conditions, and will rebloom if cut back.

I cannot get pansies to grow where it is dry and hot in summer. Even the new varieties fail for me.
And I cannot get lobelia to work for me in boxes at all...I gave up on that!

I have also found gazania daisies to be very nice and tolerant of neglect!
With my arthritis and leg issues, neglect is the magic word for me!

This year I searched Ebay and found many unusual varieties of seed there! Very inexpensive!
There are two wildflowers I like but can never find, and they were on Ebay. Silene (Armeria) and annual baby's breath!