Hello ! 
Red cosmos is the only flower I'm missing on my island.
I can trade a bag of 5 seeds for 5 seeds of red and/or yellow roses , hyacinths and pansies. Or I can trade with cherries
, apples 
or oranges 
.
I can also craft cherries items (including wall and hat), a rose wreath
, or a cherry-blossom-petal pile 
Red cosmos is the only flower I'm missing on my island.
I can trade a bag of 5 seeds for 5 seeds of red and/or yellow roses , hyacinths and pansies. Or I can trade with cherries
, apples or oranges .I can also craft cherries items (including wall and hat), a rose wreath
, or a cherry-blossom-petal pile 
