A slow build with a satisfying resolution, but lacking in technical skill. 3 stars.
Careful Flowers starts out awkwardly in the middle of a conversation. A case of taking en medias res a little too far. Context arrived quickly but my investment in the story took much longer. I enjoyed the extended supporting cast in this novel, from former hippies to the estranged extended family; everyone was believable and colored the conflict well.
My biggest disappointment in this story came from the craft. Pacing worked well, but the sentences didn't vary much. There's also constant jumping between simple past (I ate food) and past perfect (I had eaten food) that muddied the enjoyment of reading.
I appreciated both the resolution of the mystery and the romantic conflict. I worried that the romantic conflict would resolve by forcing only one party to change rather than compromise from both, and I'm glad to see I was wrong!
TL;DR: 3 stars. This is a solid book with excellent characters, but it's lacking a few style points.