The spiderwort (Tradescantia virginiana) has begun blooming in our yard. Most of them look like this, with dark green leaves and dark blue/purple flowers. The flower color is difficult to catch and is actually a bit bluer than how they look here. We have one with chartreuse leaves, which is very pretty but needs a little shade. We also have one with pink flowers. I’ve read that their flowers change color to pink when when exposed to radiation but this one was bred to have pink flowers. If the others all suddenly turn pink, then I’ll worry.