I got some seeds in a science -related “box subscription” for my kids a few years ago and 2 out of the 4 seedlings flowered this year, doing so for a few months on end. Here are some photos, though I’m afraid I took fewer than I realized, none during peak flowering apparently:
I planted all four in the ground this spring, expecting them all to flower this year. The two that didn’t flower seem to have survived our recent cold snap (many nights below freezing, two nights around 25°F), which is surprising to me. Here they are: