Here is the full list of all 33 Amy's Greenmart achievements.
Serve 25 customers with full patience
Grow your first plant
Complete day one
Complete all shops
Serve 1,000 customers
Grow 300 plants
Earn 20,000 coins
Complete 100 days with a STAR (Normal Mode)
Serve 500 customers with full patience
Buy all upgrades for a shop
Pacify 50 Troublemakers
Catch 50 Thieves
Serve 250 customers
Grow 100 plants
Hire all helpers in a shop
Upgrade 10 gadgets to the maximum
Serve 25 Celebrities
Help 25 Senior Citizens
Help 25 lost Children
Complete all days in a shop with a STAR (Normal Mode)
Feed the cat 100 times
Earn 1,000 coins
Serve 100 customers
Water 50 plants
Heal 50 plants
Complete 5 days with a STAR (Normal Mode)
Clean the floor 50 times
Pacify your first Troublemaker
Catch your first Thief
Upgrade a Gadget for the first time
Call the delivery courier 20 times
Feed the cat 20 times
Unlock all achievements