Here is the full list of all 15 SunFlowers trophies - there are 13 bronze, 1 silver and 1 gold.
Storm raged 1000 times
All of the five legendary flowers have been unlocked
Level 57 reached: fourteen years have passed by
100 flowers sunburnt
Every common flower has been unlocked
10000 rain drops have fallen
1000 rain drops have fallen
A new flower has been converted for the first time with Labee the bee
One or more flowers have been sent to a friend for the first time
Storms raged 10 times
At least three flowers from each species have been unlocked
At least one flower from each species have been unlocked
Level 5 reached: four seasons have passed by
10 flowers sunburnt
Every slot on the screen is full