early-flowering vs spring-blooming

early-flowering and spring-blooming both are adjectives.

Word	Noun	Adjective	Verb	Adverb
early-flowering	No	Yes	No	No
spring-blooming	No	Yes	No	No

As adjectives, early-flowering and spring-blooming are synonyms defined as:

early-flowering and spring-blooming: of plants that bloom during the spring

Other synonyms of early-flowering include early-blooming, late-spring-blooming, spring-flowering.

early-flowering (adjective)	spring-blooming (adjective)
of plants that bloom during the spring	of plants that bloom during the spring