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