How do I mine a block of grass in Minecraft (so that the grass stays on)?
For this you need a shovel with a silk touch, you can get it on the anvil with a suitable book or on the enchanting table with lapis lazuli and xp
When you have cautiousness on an object. But if you break them down as normal, the grass will grow again after a while.
Silk touch = cautiousness when you play in German
Enchanted shovel with care.
But only when a block of grass is nearby as far as I know