It’s an adjective so it must match the gender of the noun before it. So if you want to say non-binary person, since person is femenine, you’d say “persona no binaria”. Unfortunately, however, most nouns change gender depending on the gender of the person referred to. So you can’t say non-binary gardener without resorting to “made up” grammar.
I think there is a grammatical rule for it, if you refer to a group of multi-gendered subjects you use the male suffix, so “no binario” would be the correct term to use.
It’s an adjective so it must match the gender of the noun before it. So if you want to say non-binary person, since person is femenine, you’d say “persona no binaria”. Unfortunately, however, most nouns change gender depending on the gender of the person referred to. So you can’t say non-binary gardener without resorting to “made up” grammar.
I think there is a grammatical rule for it, if you refer to a group of multi-gendered subjects you use the male suffix, so “no binario” would be the correct term to use.