How’s she doing? How’d she take it? I’d say let her cry and be angry, share her sorrow and anger and then take her to the nursery and buy something in bloom to plant in place of the sunflower. Or cheer her up and distract her in some other way. A new kitten?
she dealt with this with more maturity than a fair number of people on this thread. Having said that, she was certainly sad about it.