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