Only thing not really mentioned in the other comments are Pixelfed and PeerTube. Again you gotta make genuine stuff not ads but if you put at least some effort in the videos and post semi regularly (and ideally use your own instance) you’ll be top in whatever niche you choose to highlight your business with. I can’t say the garden tending would make great business sense (it won’t bring you many new customers) but if the work you do is your passion, its another outlet to share it. Its also not bad to have your own (labeled) ad channel (on your instance), archives can bring nostalgia / meme material, but local only, and don’t boost them.

I don’t think it’d be bad to have your own threadiverse and microblogging platform instances for support and slice of life type stories, but that’s for interacting with existing customers and fans, not for gaining new ones. I’d caution interacting outside of your instance in that space unless pinged / mentioned directly, even more carefully than you would in other socials.