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