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