I have a total of 1 planting in a container with a 75% inorganic soil and no drain hole. It is a Saikei planting that is 4 or 5 years old. The only reason it still flourishes is because I've only used distilled water when I water it. Though I never use fish emulsion on any plants I grow indoors (and very rarely outdoors), I DO use it for this singular planting to help keep soluble salt levels from building. Because there are no solubles in distilled water, I'm also able to water in small sips to avoid over-watering in a container w/no drain hole, a practice that doesn't lend itself well to to your watering regimen when you are using tap water. You CAN do it and have healthy plants, but you will have to pay close attention to details, or be willing to tolerate the stressed plants resultant of every day practices.

Al

Ah, distilled water eh? Drat...

I suppose I'll figure something out >_>

I make small terrariums in glass containers w/out drainage & they do fine. I set these up some time ago & have forgotten what I used in my mix. Likely I lined the bottom w/ pumice & some charcoal & then used a light, fluffy type of mix like for AVs as the terrariums have been for things like Begonias, Pileas, Epicias & the like.

I'd say try it, what have you got to lose? Do it w/ an inexpensive plant & see what happens.

Well I suppose that makes sense lol