One of my Eight Thousand Quickly Forgotten Hobbies was a pair of those goofy MiracleGro Aerogardens. I kept one at the house and grew herbs in it, and had one at work that I used to try out growing gerbera daisies. The one at home quickly became a sprawling mess of thyme vines and giant mutant basil leaves and I pretty much abandoned it. The one at work became an object of hyperfixation every time I needed to procrastinate for a few minutes, and eventually started producing some really nice daisies. A coworker unloaded an African violet on me that she said she had never been able to get to flower -- apparently just repotting it, very slightly over-watering, and keeping it under the AeroGarden grow lights was all it needed. The daisies died off five years ago, but the violet is still going somewhat strong. I keep it in the room with all my musical instruments and gear, so popping down to water it every couple of days is usually a somewhat relaxing experience because that's normally one of the last rooms in my house where I can safely go to decompress.

I guess what I'm saying is that one option is to not make caring for the plant a part of your normal routine, but you can set it up so that it coincides with otherwise desirable breaks from normal routine (as long as they are fairly regular -- sort of an unroutine). At least that's how my probably-AuDHD brain rationalizes all of this.