Jim,as i dont grow neps,but since your years of cultivation using green house,am wondering the rate of achieving yellow/red /green or light brown pitchers as growers seem to prefers.
...the forest..my garden...i take photos...
I didn't see any N. ampullaria like these but just green and spotted forms when I was in Matang last year.
hi Chanrit glad to know u were here.Try next time MATANG WILDLIFE CENTRE(in case u come back ) take the PITCHER TRAIL(catalogue map is available on request) and you will not miss on the forest floor and tree branches along the trek groups of ampullaria resettes.That is where you take your rest and search nearby the forest lots of williams red,washington red ampullaria,rafflesia "gigantea",stenophylla.
There are seven types of nepenthes in Matang wildlife centre(stated in the catalogue)It is a huge area next to the Kubah National Park.As a visitor it is best take a guide.They take you to the spot without you wasting time searching.Hope that helps