Here is the full list of all 40 Wylde Flowers achievements.
Complete 100 bulletins
Cook every recipe
Marry Amira
Get engaged to be married
Form a romantic partnership
Craft every item
Start dating someone
Make an intimate friend
Turn the season to Spring again
Build the greenhouse
Make a good friend
Complete 20 bulletins
Catch every type of fish
Grow 20 flowers at once
Discover everyone's favorite foods
Get gold stars on all 20 mine collection boards
Restore the barn
Turn the season to Fall
Fly the broomstick for the first time
Construct a larger garden plot
Discover the identity of all coven members
Restore the chicken coop
Shapeshift into a cat
Make a casual friend
Upgrade the tool shed
Repair the mountain bridge
Restore the ranch
Turn the season to Summer
Adopt the cat
Make a new acquaintance
Cast the initiation rite
Discover Gramma's basement
Meet all of the residents of Fairhaven
Start your farming life
Marry Cameron
Marry Damon
Marry Giva
Marry Kai
Marry Kim
Marry Westley