To breed them you just need to water both of them it takes quite a while so if you want a quick way to do itfollow these steps
Get the beautiful town ordiance
Water the same flower that you want to breed example two black roses only water them nothing else
Then the next day there will be another black rose
Your other,flowers won't die cause of the ordiance then just continue thatwith the same patch of flower and you will have a lot innotime
I like surrounding my villagers homes with flowers and I really want a 10 blue roses for cyranos house. also I need a few white lilies for phils house. I'll hit the limit and say 5 so its 15 in total c: