Eight months ago I bought one lowland nepenthes with two pitchers. The stem length of this plant was then 9 inch. During this period it grows up and its size is now 25 inch. 3 baby plant appears and one of those baby plant forms one little pitcher. But there is no pitcher in the mother plant. What’s the reason? Please anybody help me. what can I do for her about grow pitcher? And how I’ll separate those plants?
Sometimes Nepenthes become reluctant to pitcher once they start making a vine, esspecially if they are working on basal shoots, which yours is. As far as seperating the basals goes, you would need to cut them off the main stem and root them, they are attached.
How are the humidity and light levels? If those are high, then it could be an ampullaria hybrid (as you mentioned it was a lowland species) which rarely produces upper pitchers and they are diminutive when they are produced.
Here is now rainy season. So the humidity level is very high but it remains 30 to 55% through out the year. The Nepenthes has been kept in shaded area under a tree.
For pitcher plants, not Phalaenopsis, it is indispensable to use soft water to achieve successful growth. These plants cannot survive with hard water which has low electrical conductivity...Thus, orchidists growing pitcher plants use a mixture of deinonized water and tap water.
In my experience two things stop nepenthes from pitchering. Too low of light and low humidity.
I don't grow any lowland nepenthes, just intermediate, but from what I've read it should be 50% humidity at the lowest.
So maybe try bumping those up.