I don’t grow them, but looking at your picture, I think I should!! :)

They seem to dwindle away after a few years for me (sadly).

I first saw C solida as sheets of lilac in a German park. I only have the species in my tiny garden but it is very reliable. Just going over now. It has never self seeded. The yellow C lutea is naturalised in my area and self sows with abandon in walls.

I found mine needed a few different cultivars to cross pollinate with before the seeding would occur. I think many corydalis are self-sterile, so that kind of makes sense.

dbarron I wish I could say why they dwindle. My best guess is they like a little better drainage, so those do exceptionally yet the others thin out after a real rainy summer/fall/winter. There are almost always seedlings though, and an ugly one is few and far between.

Wouldn’t it be odd if the straight wild species was self sterile?

Given wet soil is my average, you're probably correct Katob.

In Berlin I remember droves of them along some walkway, a way for pedestrians with black top and "open sides", and there they would pop up in a subtle color variety of mauve, whithe, dull pink,

all on sandy soil,

right now I garden on loam, good soil, and I have few patches that keep cropping up. IMO you need to spare them when weeding and transplanting stuff.

and perhaps slugs munch on the seedlings?

I saw them in Hamburg.

linaria, rabbits seem to enjoy nibbling mine here and there, but not like they mow down the crocus. I don't have many slugs. I see many seedlings this spring which is always fun, I even have what I hope are seedlings around the blue Corydalis fumariifolia. Most of the blue corydalis fade away in my garden, but this one keeps coming back.

Sorry flora, I meant that corydalis need another corydalis plant to cross pollinate with which isn't a clone of the one you already have. They pollinate plenty in their own species, but don't like to self-pollinate their own flowers. In some plants that's not the worst thing. Some bulbs like chiondoxa spread all over, but I have a clump of a couple hundred which all started with just one bulb and they're all clones and have never set seed.

We had two warm days and the corydalis all faded a bit. Before that the weather had been cool, and the flowers were bright and seemed to last forever.

Does anyone else grow any of the spring blooming corydalis?

@katob Z6ish, NE Pa we really love this early flowering corydalis.

https://www.houzz.com/discussions/6106523/i-do-like-george-baker#26765976

Ours are up but it will be a week or more before they have reached their peak.

(We have too many rabbits :( and yet I haven't noticed them eating our clumps of corydalis)

I sometimes thing the color is a little too bright, but then the daffodils and hyacinths open and it's all just spring exploding!

Maybe our rabbits are innocent and it's someone else. I did see vole trails...

Saw this grouping this afternoon out front: