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