Here is the full list of all 13 Garden Guardian achievements.
Snip 1000 enemies across all game modes.
Dump 100 Plant Food in one round.
Take three or more MISSes during a Trial and succeed.
Collect over 9000 points across all game modes.
Move Snippy 10,000 times across all game modes.
Enemies have attacked 10 fully grown fruit across all rounds.
In Endless GAME D, finish a round with four or more stars.
Finish a stage with any Options setting set to 0.
Earn 17 stars in Endless and 17 stars in Trials.
Score 100 points without feeding the Carnivorous Plant.