Flowers are OK. In the sense of "this guy overpaid for somethings that's gonna die really soon all for me" flowers are cool. There were a few times that I had kinda expected flowers and not gotten them. One of those times, I got a houseplant instead. I got really pissed at first, and then I realized how much cooler of an "I'm sorry" gift it is.
He explained "flowers will die, but my love for you and our relationship will go on forever, and I thought this plant that we could nurture and care for (like our relationship) was a better symbol."
I've still got the plant. Erwin will be 3 in April