Reason stems have weak roots
I am wondering why my stems do not develop as strong root system as my epiphytes and rosettes. My stems, Luwidgia, Hygrophila and Mermaid, are getting vigorous top growth, vibrant color, and lot of aerial roots, but the bottoms are weak and often rotten out that I have to replant. Is it the nature of all stems or it is because my light level at the substrate is too low. I have around 40 PAR at the substrate and up to 150 PAR high up, so it is in the medium light range.
For Dutch growers with very high light, do your stems develop strong roots?