Here is the full list of all 49 HARVESTELLA achievements.
Craft every kind of item
Fortify all weapons to max strength
Catch every kind of fish
Cook every kind of meal
Eat Dangerous Nitro Sautee at break time
Harvest crops a total of 10,000 times
Cook HQ Pure Medicinal Porridge
Rear max livestock and max bond with all
Collect all Conellu Dolls
Defeat every kind of FEAR
Overcome the last trial of the Karenoid
Destroy all walls with bombs
Expand the farm to its max size
Unlock all jobs
Exchange vows with a partner
Complete all quests
Reach maximum closeness with everyone
Max out all 4 Break Gauges
Catch 10 kinds of fish
Earn over 1,000,000 Grilla from shipping
Clear 10 floors of the Karenoid
Complete Chapter 10
Find all caves by digging
Level up your pet to its maximum level
Complete Chapter 9
Complete Chapter 7
Complete Chapter 8
Complete Chapter 6
Complete Chapter 5
Complete Chapter 4
Harvest crops a total of 1,000 times
Harvest a high-quality Islet Watermelon
Feed your pet for the first time
Complete Chapter 3
Collect 10 Conellu Dolls
Rear your first livestock
Expand the farm to level 3
Defeat your first FEAR
Fortify your weapons a total of 5 times
Improve closeness 5 times
Catch 20 fish in a day
Catch a size 10 Quotidicrab
Complete 5 quests
Cook 5 kinds of meal
Catch your first fish
Craft 5 kinds of item
Complete Chapter 2
Complete Chapter 1
Harvest your first crops