Full list of all 54 Horticular achievements.
The base game contains 41 achievements, and there is 1 DLC pack containing 13 achievements.
Frozen Frontier completed.
Frozen Frontier completed on the hardest difficulty.
Frozen Frontier completed without using the Heat spell.
Mastered all animals in the Frozen Frontier.
Unfroze all glacier patches.
Thawed all scholars before the full council.
Had all unique creatures in the end of Frozen Frontier.
Stacked the right items for a reward.