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 a challenge holding a Critter
Complete the game 100%
Collect all crystals
Unlock all telerouters
Rescue MOM
Plant 10 Champolines on top of each other
Discover the bull and the sheep
Discover letter block P
Blast a critter 100m
Orbit the entire planet in BALL mode
Complete all challenges
Throw 100 seeds whilst gliding
Unlock all seeds
Take a critter to the moon
Flower all STARPLANTS
Grab two Sporchids simultaneously and ride upwards for 400m
Visit all biomes