spring-flowering vs early-flowering

spring-flowering and early-flowering both are adjectives.

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

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

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

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

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