Q.Why Doesn’t My Spiderwort Open
I get the flowers in buds I can see the purple but they never open what am I doing wrong?

Certified GKH Gardening Expert
I see signs of infection. I do see signs of powdery mildew which can be a sign that the plant's immune system is compromised. It could be another infection as well.
I suggest some fungicides and then proper care should bring it back to health.
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/ornamental/flowers/spiderwort/growing-spiderworts.htm