Not to sound like a jerk, but if you look at pictures on wikipedia or anything that depicts mexi- pings growing, especially P Moranensis, they all grow on decomposing logs covered in moss. Since I have seen them growing in all kind of moss, I went local to this lake we have and dug some different types of moss up. I put about 1/2" of play sand in the bottom of each bin and then just laid the moss on top of that and put in enough tap water that had been sitting out for a few days over the moss by about 1/2"- 3/4" and it got the moss moist and then i pushed the moss into matts over the sand and flattened it. I just basically dropped my pings on top of the moss and most of them have roots that have not deteriorated yet and are inches long rather than fractions of an inch. Plus, I just use a 17 gauge needle with the very tip cut off as a modified dropper to drop just a small drop or 2 of very diluted orchid fertilizer on some leaves. Roots of most pings cannot take up much of anything besides water and possibly some of the basic macro nutrients. I would suggest using orchid fertilizer at 1/4th the recommended strength and dropping just a bit on a leaf or 2. I do that and my pings have yet to suffer. The only things that are not growing like weeds at this point are my P gigantea but they should soon.My P moranensis are also blooming now so I guess it is self pollination time for now unless anyone else have some P moranensis they feel like swapping or trading. One more thing, the more nitrogen you feed your pings that is meant for orchids or other plants, the more crowns you will get from each plant. ALL of the plants I put dilute concentrations of fertilizer on have started growing multiple crowns and are in the process of splitting as well as blooming.