Valentine's seeds with no parents are appearing in the Wild Garden! 
I noticed them today and picked up some for myself.
It seems there are also some interesting Bleeding Heart seeds bred by other players! 
Which seeds will you be picking up or breeding this holiday season? Are there certain varieties you're trying to get? Personally, I'll be concentrating on the Heart of Valentine seeds and picking up some Bleeding Hearts, since I only now realized I never grew any before.