I dug my staircase so that it was 3 blocks wide, but you can make yours as wide as you would like! The wider it is, the faster the grass will grow. Be sure to place torches as you're working your way up, as grass needs a light level of 9 or above in order for it to grow! Start digging out your staircase and head all the way up until you reach grass. If you know what's above you at ocean level (coordinates y:64), and which direction to dig towards, then great-you can use this to your advantage! Make sure the entire area you would like to turn into grass is covered in dirt, otherwise it won't work! Video Tutorial Step 1 Preparationīegin in your underground area where you would like grass to be. Please enable JavaScript to watch this video.