Patch 4.05 was released today and with it comes a new flowerpot seed:
As with the other flowerpot seeds these can be purchased from the Material Supplier in each housing district. The default color for the daisy corsage is yellow and the color can be changed using pomace in the same way as the others.
I have added a new seed category to the site appropriately named Flowerpot since it seems we keep getting more of these.
I also forgot to mention this small update from the 4.0 patch notes:
Plants that are ready to harvest from garden patches or flowerpots will no longer wither.
Plants will still wither if you don't water them before they are ready to be harvested though.