on topic of substrate use.. im only going into my 2nd year using a very porus potting mix..
but the results i have had with my titanums, konjac, various amorph species.. has been good...
the root systems on the corms has been outstanding.. i attribute shared success to the potting mix,
and my ingredients used when watering..
my potting mix i make my own.. roughly
60% pine bark chunks (around 3/4 to 1 inch (2 cm)) in size
30% similar sized pumice
i try to get most of the pine dust out of the bark before i mix for potting
watering..i always fertilize when i water
im "thinking" my fantastic root growth is from the good drainage (yes i water more)
and from using kelp, fulvic, humic acid powders..along with biological fungicide
i was concerned using this very porus potting mix with..especially the tropical amorphs.. thinking
the pots would dry out too much..and theses tropicals prerfering a more "moist" potting mix..
but i have found the roots fine.. with many clumps of root hairs of the main roots..
nice and firm white..and "furry" with root hairs.. LOL
would love to hear what you all find most successful..and experimenting with..
??? much thanks...