I feel the plural “Plants” serves this name best, you then cover the complete niche. Singular limits the name to a single one plant, which is possible that an end user might enter the industry with a wellness plant and take interest in the name.
but I think this domain has a more likely hood of changing hands with a domainer.
I think you could get your registration fee back on the name perhaps, if an end user were to come along, I think the top most you could get payed is $500 to $700 for this name.