Hi Marcel, I haven't seen you since you were posting pictures on ABPO.
You had some amazing pictures of some fantastic plants.
Sorry, I don't know the answer to your question. I hope someone does.

Steve

Marcel Larouche wrote:
I search the best ph for Paphiopedilum sanderianum and also the best "
substrat"... mix , for adult plants and seedling.

Thank's

Marcel,