The local CPers started a year ago with the use of burnt earth (aka burnt clay or burnt soil) with their Neps. This media is used in general gardening to increase drainage. Here is the thread on the local forum if anyone is keen to take a look. http://www.greenculturesg.com/forum/...howtopic=11805
The change was wonderful for N. northiana, which responded exceedingly well. Then we decided to use it for N. campanulata and N. merrilliana as well. The results are amazing!
I have got no idea what is the pH is or the mineral content is(pretty high from the salt build-up). But well, it works.
N. northiana - arrived bareroot in June this year, now pitchering on the leaves formed here.
N. campanulata - arrived bareroot in June and July this year
N. campanulata - these are plants grown in sphagnum moss and large pieces of orchid media (similar to pumice) under the same conditions as the ones above; I changed them into burnt earth yesterday