Chapter 4You will find this plant in chapter 4 in the hidden room but will grow it much later on in the chapter after reaching the attic
1.Fill pot with soil
2.Add Nightfall seed
3.Add water
4.Take plant to up to the attic and place in spot in front of the projector
5.Add the coloured slides to the projector in order from left to right:
Blue - Yellow - Orange - Red
6.Turn on the projector and the plant will grow
If you need more help with this you can see my video below: