Is it getting more and more shade?

Mine did quite well this year. There was even a surprise appearance from a hybrid I thought had died off a few years ago. And ten years isn't really that long for them. There are limits to their shade tolerance, though.

No it is in full sun still, lots of foliage but few flowers.

My Baptisia "Purple Smoke" bloomed very well this year and is looking vigorous as usual. The blue-flowered species seems to have been declining somewhat in recent years, though I think that's because tall ornamental grasses are gradually shading it out.

No idea why a healthy-looking stand would have scanty blooms (they're supposed to do well in a favorable spot and flower for decades). You could try taking stem cuttings and see if plants perform better in a different location.

My 'Solar Flare' bloomed prolifically. Unfortunately a heavy rainstorm caused the entire plant to fall over. Last year the same thing happened. Next year, I'm getting a peony ring. I hope that will work.

Mine seem to be doing fine except where the voles ate some of the roots, but that reduces the entire plant.

my twilight prairie blues did not bloom. I wonder if it because the rosa glauca has grown enough to shade it.
Marie

All my established baptisias bloomed prolifically this year, including Twilight Prairie Blue. My other mature plants are species Buddleia davidii. I also provide peony rings for all of them to prevent flopping since they're so top-heavy.

I only have them growing in full sun, sandy loam soil. They've been growing in my butterfly beds since 2007. I winter sowed the seeds a friend gave me last year and have a dozen or so seedlings about 5" tall to plant out come fall.

My four year old seed grown plants flowered significantly less this year than last year. I was wondering if the cold winter had anything to do with it. they are still growing in full sun.

I don't recall the variety of my 4 Baptista, but they are in 4 hours of sun and bloom nicely in late May here. They've lasted a good 10 years here and seem happy to go 10 more.

My Baptisia has been great this year, although I'd love to see more blooms. It is currently setting seed pods. It does sit on the northwest side of the house and probably only gets 2-3 hours of afternoon sun. But I'm very happy with its shape... in fact, I'll be forced to move a Sarah Bernhardt peony because it's getting pushed out by the Baptisia. Oh, it is the Purple Smoke variety.

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My 10 year old clump flowered okay... Though much less then years prior. The newer variety I planted just last year bloomed great... So who knows.

As a side note on flopping... I gave up the peony rings years ago and just remove the seed pods.... Thick stems included... After flowering. The plant hasn't flopped since. You give up the neat look of the black seed pods, but it's worth it to me plus I don't get a ton of seedlings popping up everywhere in the spring like before.