Here is the full list of all 22 Grow: Song of the Evertree achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Unlock the Mountainside Ward
Unlock the Valley Province
Unlock the River Precinct
Complete first district requests
Create a Perfect World Seed for each World type
Kick around items in the Gnome House
Unlock all building blueprints
Unlock the Forest Region
Inspect 20 villagers
First Accident World Seed created
Complete a relationship character to the "Friend Ending"
Befriend 5 critters
Unlock the Plains District
Use the Watering Can on a bed
Build 20 buildings
Turn 100 items into Essences
Have 10 residents leave town
Talk to 20 villagers
Walk a total of 1,000 miles
Assign first villager to a house
Walk 500 miles
Unlock Book