Here is the full list of all 33 Voodoo Garden achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
reach voodoo level 30
produce 10 000 items
plant 20 trees
expand garden 20 times
produce 240 voodoo dolls
collect 6666 mushrooms
collect 666 lizardtails
collect 2000 dragonflywings
free 3 spirits
click skull 10 times
erect 7 totems
own 1 000 000 gold
click crocodile 30 times
collect 1234 snailhouses
collect 3333 roots
collect 999 snaketeeth
restart game
sell 3 herbs
sell 7 trees
sell 5 shrubs
plant 15 shrubs
reach voodoo level 20
sacrifice 11 animals
expand garden 10 times
plant 10 herbs
collect 444 beenests
produce 1000 items
own 100 000 gold
reach voodoo level 10
scare 88 bats
own 10 000 gold
produce 100 items
collect 69 froglegs