Here is the full list of all 17 Grow Up achievements worth 1,000 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox One.
Complete the game 100%
Collect all crystals
Complete all challenges
Flower all STARPLANTS
Complete a challenge holding a Critter
Throw 100 seeds whilst gliding
Orbit the entire planet in BALL mode
Discover letter block P
Unlock all telerouters
Unlock all seeds
Grab two Sporchids simultaneously and ride upwards for 400m
Blast a critter 100m
Discover the bull and the sheep
Take a critter to the moon
Rescue MOM
Visit all biomes
Plant 10 Champolines on top of each other