If a shovel had the silk touch enchantment when it was first introduced, grass placed in the Nether was grey, like mycelium. ... Grass can spread to nearby dirt as long as mycelium or podzol does not get there first.
Does grass grow in Nether?
You cannot carry a Grass Block unless you use the enchantment Silk Touch (currently not available in the Xbox 360 version). This is the only way to grow grass in The Nether or The End since it does not naturally occur there. Uses: Grass Blocks can be used to grow Tall Grass and Flowers when sprinkled with Bone Meal.
How do you grow grass in Nether?
Using bone meal on netherrack that is placed next to or adjacent to warped or crimson nylium transforms the netherrack into nylium of that type. No block can be above the netherrack during this process. This transformation can also be done by activating a dispenser with bone meal directly into that netherrack block.