Quote[/b] (xscd @ Dec. 20 2006,8:32)]Very interesting discussion thread.
My Pinguicula "Titan" (a Booman Floral product given to me as a gift) is my first ping. As the days grew shorter this year, so did its leaves. I guessed that it was going into the dormancy that Ping. moranensis types do when their weather becomes a lot drier. So, I allow the medium to dry out pretty thoroughly between waterings now. The dormancy doesn't seem to need cold, only dryness, right?
My Titan medium is 1 part each of sphagnum peat, perlite and silica sand. But I'm thinking about transplanting it next season into 100 fine grade PrimeAgra "leca" (lightweight expanded clay aggregate). Like others, I have thought about supplementing it with calcium in some way. Gypsum sprinkled on the soil seems like a possibly good way, because it is pH neutral. (it is a salt formed of one very alkaline mineral (calcium) and one very acid mineral (sulfur) that balance each other.) I could perhaps go to White Sands here in New Mexico and gather as much as I want (the vast and deep white "sand" is pure gypsum). But, since we have a bag of it in the barn...