I see, definitely interesting info.
Mostly I have not put rocks or large parts at the bottom of containers, but sometimes I mixed the bottom part with more non-organic parts sort of influenced by that idea.
These would be in a place where probably would have to be watered by hand and concrete beneath so not much wetness would gather if I am careful with the way I water.
The medium is indeed more "heavy" than coarse, so probably rare watering.
I will get some taller containers too, it's just that I only have shallow ones currently unused.
I know tulips don't like lots of water and heavy dampness, I guess my main personal concern outside watering and wetness levels was if the containers are shallow is there enough room for roots to develop.
