I keep picking up “house plants” at the garden center for my kitchen sink window sill. They are supposed to grow in limited light, and only need water once a week. Because we have “solar screens” that block the sun’s rays from coming into our house, I have to say the light on that sill is VERY limited, but I keep on trying to find a small pretty plant that will flourish there. It’s kind of an obsession with me!
Dropping by briefly to check in! You have set up a problem for the plants, but how about setting them in open shade (outside) a couple days a week; I do that with the bird's nest fern that sits more central in the family room. (I even brought it in the car to Ashley's so I could look after it while away! It's thriving! (Reminds me of the movie title, "Sisterhood of the Traveling *Plants*"!