Perennials: Looking for blue flowered perennials

Looking for some blue flowered, drought tolerant perennials. Anybody out there have any good ideas?

Amsonia tabernaemontana is one tough customer. I have never seen it in distress. Spring bloomer, I like it for it's appearance throughout the season. Thinking of using several as a herbaceous hedge. The species A. hubrechtii comes highly recommended.

Did a search and this is what I came up with..:
Corydalis elata
Stokesia laevis 'Purple Parasols'
Aquilegia alpina Alpine Columbine
Campanula rotundifolia Bluebells of Scotland
Erigeron compositus var. discoideus Mat Daisy
Erigeron speciosus Showy Fleabane
Geranium fremontii Fremont Geranium
Glandularia gooddingii Gooding's Vervain
Ipomopsis longiflora Blue Starflower
Iris missouriensis Western Blue Flag
Amsonia tabernaemontana Willow Amsonia
Leadwort 'Plumbago'
Tradescantia Spiderwort
Platycodon grandiflorus Balloon Flower
LAVENDULA 'CYNTHIA JOHNSON'
LIATRIS PYCNOSTACHYA
LIMONIUM GMELINII HUNGARICUM
LOBELIA SYPHLITICA
LUPINUS 'THE GOVENOR'
MONARDA 'BLAUSTRUMPF'
NEPETA MUSSINII
mountain bluet
Ceratostigma plumbaginoides
forget-me-not
Monkshood Aconitum carmichaelii
Aster cordifolius 'Little Carlow'
Salvia chaemedroides
Salvia interrupta
Veronica gentianoides
Veronica incana
Veronica spicata
Veronica teucrium cs 'Shirley Blue'
Veronica spicata cs 'Sightseeing'
Viola coreana
Viola odorata cs 'Queen Charlotte'
Campanula glomerata (clustered bellflower)
Lactiflora, the Milky Bellflower
poscharskyana (Serbian Bellflower)
Tussock Bellflower (carpatica)
BLUE BIRD Nolana paradoxa
'MISS JEKYLL INDIGO' Nigella damascena
Calamintha nepeta Calamint
Campanula carpatica Carpathian Bellflower
Euphorbia myrsinites Euphorbia
First Choice™ Bluebeard or Blue-spirea

Some of these seemed to be more purple/lavender than blue, but I included them anyways.
HTH,
SYR

For true blue, the lithodora 'Grace Ward' is great and it can get woody so not truly herbaceous, in the same category is Caryopteris 'Blue Beard' it is blooming now is quite stunning. The anagallis or blue pimpernel is really blue too, it would probably be annual where you are though, it is borderline here, I love blue too. There are some great salvias.

Wow! Singleyellowrose, you didn't have to do a search! I was really just trying to see if there was something out there I wasn't thinking of! Thanks! That's quite a list you came up with! I do have a number of blues, but was wanting some more to fill in. Thanks for all the great suggestions folks! Will have to look some of those up, like the lithodora.
naturepatch

You can also do an advanced search in the plant database for blue flowers

I have alot of these that are on the list...so it was kinda easy for me...LOL

Lucky you! Didn't know there was a blue euphorbia. Will have to get busy and look some of them up.
Does anybody know if the blue malva is really blue, or if it is cold hardy to zone 5? Been thinking about investing in it for a while.

poppysue! leave it to you!!! I just wrote in blue 794 plants came up. You are just too smart for this gal. You need to show us around the PDB. like different ways if can be used. I would of NEVER thought of just writing in a color. Don;t know why. thanks! to naturepatch too for asking the question

You are very welcome! I am looking for something a bit more specific than just blue though, so a blue search would make my head spin and give me headaches! I DO wish someone here had the blue poppy that is hardy to zone 5. Think it will take me a while to find that one.

Some one DOES have that himalian one I do believe. Check with Wezzingreens or Everet. Check in a general discussion forum and post that you are looking for one. Or in the seeds trade thing.

if you write in Blue Poppy in the Plant Data base. these2 names do come up and they have photos posted. so. they MUST of grown them. Very helpful people. I am sure they will help ya out.

I am sure someone has a blue Meconopsis; just ask for it in the tradeforum:)

http://www.stewo.no/M/Meconopsis%20x%20sheldonii.jpg

Thought I had it on my trade want list, don't remember if I've searched on it before or not. Thanks for reminding me though! Something else to work on!
Naturepatch

I have a periwinkle plant that has a dime size true blue blue flower on it. It is blooming now and it is a perennial. The only thing with periwinkle is that it can become invasive especially in my zone 7b.

i would like to know where to find some of these blue flowers any help would be appriciated plmk if anyone can help thanks. blue is my favorite color and i want them everywhere in my garden thanks again moretz