The only one that has not died within a few weeks of planting was 'Blue Fortune'. It had a fabulous first year, a decent second year, and the third year it was so sad I pulled it. Every other one I tried was a complete failure.

I'm with Hoovb and JXBrown unfortunately. I keep trying them, but them seem to need a lot more water than they are supposed to.

I thought that I saw some agastache at the Big Orange Box yesterday, but when I got closer, it was Canary Island sage, S. canariensis. I don't know how sturdy that would be, but the color and growth habit were quite agastache-y.

I've been growing Agastache only about five or six years, having only recently discovered it in my long gardening life. Mostly I love it and wish I had discovered it earlier, but I've had mixed results with it. Sometimes it doesn't overwinter and I don't know why. Some plants flop pretty badly. The floppy ones are on slim water rations and live with a little shade, so the floppiness is probably more on me than on them. But when they are happy, I just love them.

My current favorite is Agastache Kudos Yellow. It has filled an 18" container in only its second year, is incredibly floriferous and is a fabulous color that looks good with everything. I've just deadheaded it and only two weeks later, you'd never know it, as it's in full bloom and looking absolutely fresh and perfect. I'm going to divide it next spring and hope it's just as happy in the ground.

Another that does well for me is Agastache Tutti Frutti. It's taller and is a good background plant. It has come back for me for several years. Same with several Nectar series plants - Grape Nectar, Raspberry Nectar, Grapefruit Nectar and Orange Nectar,

i have another called Globetrotter that has a different look. Quite large flowers, darker in color, but not as dense a plant, nor as floriferous as other Agastache. It is a great color next to the yellow flowers of Ratibida pinnata.

i don't find it that drought tolerant. Oh, did I mention that I love the way they smell!

Wow! Thank you Echolane for the excellent information!