I posted this in the gesneriad forum, but haven't recieved a response yet.

Most sources state that petros like additional lime in the potting mix, but what Ph am I looking to achieve? Also, how much fertilizer do they like and does this vary by season? Should I cool them down to the low 50sF in the winter and slow down feeding and watering?

I also get concerned that some of the cultuaral advice about them liking cooler temps, drying out, and additional lime, may only be true of some and not all, as I imagine they grow in somewhat different conditions, within thier geopraphic range. For example exposed on a dry, windy semi-alpine field or growing on among the limestone rocks on a stream bank. Anyone have any adivice, experience, feedback, or resources they can share?

Thanks