low-growing vs flat-growing

low-growing and flat-growing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
low-growing	No	Yes	No	No
flat-growing	No	Yes	No	No

As adjectives, low-growing and flat-growing are synonyms defined as:

low-growing and flat-growing: of plants that grow relatively low to the ground

Other synonyms of low-growing include ground-hugging.

low-growing (adjective)	flat-growing (adjective)
of plants that grow relatively low to the ground	of plants that grow relatively low to the ground