Conspiracy theory: Nintendo wants people to use their online service to trade. Therefore they locked certain elements to your switch account such as flowers. Otherwise everyone would reset for roses and lilies and there wouldn't be as much trading going on.
My birth month is November and my native flower is cosmos, so I guess the pool of native flowers you can get is different from the pool of shop flowers? Because mine are cosmos, pansies, and tulips, with hyacinths added more recently. My brother is also November and our shop flowers are slightly different, too. I wonder if that’s attached to birth month or just random?So I guess, since I have pansies and my old town was mums, November (11/23) is those and possibly hyacinths since they're always in my shop? or Tulips cause they were on my last island. Weird. Windflowers are always in my shop too.
Since I had nothing but time on my hands I reset got each month until I got the 3 flowers for that month and made a list!
January - Windflowers, Pansy, Mums
February - Pansy, Windflowers, Hyacinths
March - Tulips, Pansy, Hyacinths
April - Tulips, Windflowers, Hyacinth
May - Roses, Tulips, Windflowers
June - Lillies, Tulips, Cosmos
July - Roses, Lillies, Cosmos
August - Lillies, Cosmos, Mums
September - Cosmos, Lillies, Mums
October - Mums, Cosmos, Roses
November - Mums, Cosmos, Roses
December - Pansy, Mums, Roses
I doubled checked August and September since they had the same flowers but after double checking them, they do indeed have the same flowers. I’ve also found that while the months have 3 flowers that can be native, the 3 possible native flowers are not guaranteed to be available to be bought in the shop. I have 2 friends who have birthdays in October and neither of them had Roses in their shop but had flowers that weren’t native to October such as Hyacinths, Windflowers, and Pansies.
Since I had nothing but time on my hands I reset got each month until I got the 3 flowers for that month and made a list!
January - Windflowers, Pansy, Mums
February - Pansy, Windflowers, Hyacinths
March - Tulips, Pansy, Hyacinths
April - Tulips, Windflowers, Hyacinth
May - Roses, Tulips, Windflowers
June - Lillies, Tulips, Cosmos
July - Roses, Lillies, Cosmos
August - Lillies, Cosmos, Mums
September - Cosmos, Lillies, Mums
October - Mums, Cosmos, Roses
November - Mums, Cosmos, Roses
December - Pansy, Mums, Roses
I doubled checked August and September since they had the same flowers but after double checking them, they do indeed have the same flowers. I’ve also found that while the months have 3 flowers that can be native, the 3 possible native flowers are not guaranteed to be available to be bought in the shop. I have 2 friends who have birthdays in October and neither of them had Roses in their shop but had flowers that weren’t native to October such as Hyacinths, Windflowers, and Pansies.