Almost a week after buying Kinutasou's flowerpot, I finally got a rare skill flower from it (her 2nd).
With flower stones? Negative. Equipment flowers have been considered premium items here and are only given as a bonus in some promo gachas (require DMM points). At the present time, there's no way to get them with free currency.
There's nothing to buy w/ FK besides Gacha and Inventory space?