@hbh1541230 I have Seasons and no you don't need to keep fertilising them after they are perfect. Yes now you mention it, since the last patch I get the occasional dormant day when my plants don't bloom. I'm just glad the dirt pile problem isn't still driving me up the wall.
I just did a huge fertiliser experiment after Horse Ranch was released. I was testing manure vs other fertiliser. I have the weirdest little page of testing info in my notes app. Dog poop proved to be just as good as horse manure.
Side note, funny story I decided to sell Horse Manure as fertiliser in my gardening stores...only to find It's not bagged when placed on a retail store shelf. So I quickly changed my mind!