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
Reach Oak Tree LVL 20
Reach Oak Tree LVL 15
Have at least one of each tree
Have at least one of each item in your garden
Have at least one of each hat equipped
Have at least one of each bush
Have at least one of each plant
Have a Deco Point of at least 50000
Unlock all cards
Have a Deco Point of at least 25000
Have at least one of each decoration
Have at least one of each item in the special category
Equip a Mellow with a Mask
Have at least one of each item in the animal category
Dolphins bump 100 fish
Gather or generate a total of 100 Golden Acorns
Meet VaragtP
Reach Oak Tree LVL 10
Gather or generate a total of 50 Golden Acorns
Have a Deco Point of at least 10000
Reach Oak Tree LVL 5
Bees produce 10 jars of honey
Frogs catch 100 butterflies
Bee stings a mean critter
Minibirds produce 10 eggs
Gather or generate a total of 10 Golden Acorns
Make a magpie drop something
Feed a bunny
Catch 10 fish
Reach level 100
Buy 25 garden expansions
Gather 1M Gold
Reach level 50
Buy 15 garden expansions
Gather 100k Gold
Gather 10k Gold
Buy 5 garden expansions
Reach level 10
Bash 10 moles