Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Peony is regular. It follows the -ies Conversion rule.
Use plural verbs: "The peonies are ready" (not "is ready").
Yes. The plural peonies is standard across all English variants.
The word peony follows the standard English pluralization rule. When forming the plural, peony becomes peonies. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why peony becomes peonies helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using peonies in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The peonies are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.