Here's the first M. schlechteri after a bit of repotting, the caudex and everything seemed fine.
Here's one of the two M. North Sumatra, I'm going to keep one in my terrarium and one in my tent just to spread things around a bit. There's a bit of browning on the side but it feels firm to the touch so I'm not sure if it'll be an issue.
Closeup of some of the other M. schlechteri seedlings that had some overfertilization, which I think is causing the leaf curling. Also a couple do have some brown discoloration on the caudex too, but it's still firm to the touch. For example, the one on the bottom left in the picture on the left. I went and did a flush with tap water and removed a bit of the algae covered moss, I didn't really repot any of these for now.
Some repotted M. "North Sumatra" (left, the 3 survivors from the different top dressing peat/perlite/sphagnum/coffee paper experiment, only the sphagnum and coffee paper ones made it out alive) and M. spec. Siasiada (PNG) (right)
Some more seedlings of Anthorrhiza bracteosa (Normanby, PNG) on the left and right. The left pot I did a repot to new media, the pot on the right I'm letting it be with just a flush, in case moving seedlings around this early would kill them. THe pot in the middle is some more M. spec. Siasiada (PNG) that were repotted. I think previously I had 14 seeds, but most died to damping off so I think there's only 3 plants left and 2 small caudex stubs that I'll keep in the pot to see if they ever resprout some leaves.
Another pic showing some of the seedlings after a repot or water flush. The peat pot on the bottom is another pot of Anthorrhiza bracteosa (Normanby, PNG) that I'm testing in a peat top dressing again, just in case Anthorrhiza behave differently.
And finally a dish of more Anthorrhiza bracteosa seedlings, and 3 larger seeds of Anthorrhiza recurvispina (Missima Island, PNG) in the top right of the dish, just testing out the coffee paper sowing method. The A. bracteosa has made so many seeds often with 7-8 seeds per berry that I have some room to play around a bit with different conditions. For me this sowing method doesn't work as well since I notice the tray keeps drying out, and I have to add water every day which I tend to forget to do.
Unfortunately the A. recurvispina seeds never sprout. I've had two berrries for a total of 1 + 3 seeds sown in sphagnum and they didn't sprout at all despite looking nice and large. The 3 large seeds in this dish was from a third berry. If they don't sprout maybe the seeds from this plant are just duds, which is unfortunate as I really like the parent plant.
Anyway lesson learned, I got to dilute the fertilizer a bit more or just not fertilize at all. The reason why I started fertilizing the seedlings was because I saw some yellowing or dropped leaves. But I guess I should dilute the solution down a lot more, maybe to like 200 ppm.
For damping off, I'm going to start applying some Bonide Fruit and Tree plant guard fungicide:
https://www.amazon.com/dp/B00FGIPO5C
I'll try it on some test seedlings, if they don't die maybe I'll use it more.