As soon as I read your question, I thought daylilies. I see a couple other people already suggested this but if you're doing this like a poll, here's another vote. Only problem with these is the VAST possibilities of colors and heights. You would really want to see the exact blooms of the particular plant to know for sure. In general, though, I would go with a bold shade of whatever color I like to contrast the softness (pastel-ness?) of the lavender & moonbeam. I thought the dianthus suggestion was also a good one since the foliage is interesting even when it's not in flower and you probably look at these plants around your patio a lot. Many dianthus will also have that wonderful spicy carnation smell, too. I think it would bloom before the lavender and moonbeam, but confirm that with folks in your area before accepting it as fact. Daylilies would probably bloom around the same time?

Anything that needs to be coddled doesn't belong in my flowerbeds so I'll pass on Moonbeam--reluctantly--unless I come across it on a markdown table at some point and try it again with that below grade planting. Sienna Sunset didn't come back either but that was definitely my fault so I'll give that one another chance if I find it somewhere. Zagreb has more than outgrown the spot where I originally planted it so that'll get divided this year and planted in a few other spots around the garden.

I just came from the garden center where I purchased SEVEN one-gallon pots of coreopsis (I think Ive just found my favorite perennial).....LOL :-) I bought three Creme Brulee, two Heaven's Gate, and two Moonbeams. Im gonna wait until the sun starts to go down before I put them in my flower beds but it looks like the Moonbeam is gonna have to go in a corner by itself...its looking like it will probably grow to be too big for my small 4x12 bed to handle. As a matter of fact, even the itty bitty Creme Brulee looks gigantor in my little "piece" of a garden (especially compared to gottagarden's oasis). I'll take pics tomorrow and post them so you all can tell me what you think :-)

hmmm, one year it seemed to bloom all summer. not since them. perhaps it is the water. i'll try next year.