Nightbloom is the evil cousin of lavender. It grows in the exact same way but in a different location. You will come across this as a crafting component for a few items and you will more than likely be asking yourself where you can find some nightbloom.
Where to find Nightbloom
You can find nightbloom growing naturally in the undead areas of the map. These are the areas that contain gravestones, skeletons and trees with rusty colored leafs. They grow at a similar rate to lavender plants. They generally just pop up out of nowhere when the night cycle has passed and it is morning.