What's the plural form of Napier grass? Here's the word you're looking for.
Answer
The noun Napier grass can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be Napier grass.
However, in more specific contexts, the plural form can also be Napier grasses e.g. in reference to various types of Napier grasses
or a collection of Napier grasses.