Hello Luke,
To Arisaema flavum you can
find here http://www.amorphophallus-forum.de/anzuc... s-f26/t5194-f14 a breeding report - there I had written that I would not separate them; Possibly to a larger pot, if the ausarate pot is bulging out; but I don't think that's going to happen in the first season.
Ada has also written something about her planted A. flavum:
http://www.amorphophallus-forum.de/arisa... en-f27/t5974-f7
Colocasia lihengiae has not been described for so long; here:
https://ejournal.sinica.edu.tw/bbas/cont.../bot424-10.html says:
"Distribution and Habitat
Colocasia lihengiae grows in clusters of 1-4 individuals in small populations at edges of and in forests in limestone areas at 600 m. Other aroids in the same habitats include Alocasia odora Koch, A. navicularis (C. Koch) C. Koch, A. longiloba Miq., Colocasia gigantea (Bl.) Hook. f., C. esculenta (L.) Schott, Pothos scandens L., Remusatia vivipara (Roxb.) Schott, and Rhaphidophora decursiva (Roxb.) Schott."
So you can cultivate the safely like other Colocasia e.g. esculenta simply in humic substrate and warm.
The species was found in the south of Yunnan; the climate should therefore be certainly subtropical or tropical; Whether the part belongs to the tropical part with rain and dry season (
http://www.chinareise.com/china-reiseziele/xishuangbanna.php ), does not tell me.
How long has the sowing of paeoniifolius been?
Happy ggrowing, Bernhard.