Full list of all 40 Plantera 2: Golden Acorn achievements. It takes around 3-4 hours to unlock all of the achievements in the base game on Windows.
The base game contains 30 achievements, and there is 1 DLC pack containing 10 achievements.
Pet Tea the cat in the credits screen
Dolphins bump 100 fish
Have at least one of each bush
Have at least one of each item in your garden
Have a Deco Point of at least 50000
Meet VaragtP
Have at least one of each plant
Have at least one of each tree
Have at least one of each item in the animal category
Have at least one of each decoration
Have at least one of each hat equipped
Equip a Mellow with a Mask
Have at least one of each item in the special category
Reach Oak Tree LVL 20
Have a Deco Point of at least 25000
Reach Oak Tree LVL 10
Reach Oak Tree LVL 15
Unlock all cards
Gather or generate a total of 100 Golden Acorns
Bee stings a mean critter
Frogs catch 100 butterflies
Bees produce 10 jars of honey
Have a Deco Point of at least 10000
Gather or generate a total of 50 Golden Acorns
Minibirds produce 10 eggs
Reach Oak Tree LVL 5
Gather or generate a total of 10 Golden Acorns
Catch 10 fish
Make a magpie drop something
Feed a bunny
Buy 25 garden expansions
Reach level 100
Buy 15 garden expansions
Gather 1M Gold
Reach level 50
Gather 100k Gold
Bash 10 moles
Gather 10k Gold
Buy 5 garden expansions
Reach level 10