Local growers have been wondering why
1. there are blotches of yellow on the leaves here and there
2. the oldest leaf turns yellow then black very quickly when the plant is putting out larger pitchers
I am wondering if the media is the cause of the rapid blackening of leaves. Is there absence of some essential mineral(s)? And would fertilising help?
Anyone growing this species please kindly give your comments.
Here is an example of my own plant. The three oldest leaves are turning black with the production of the pitcher.
The pitcher is reaching 2.5" but the previous one was only 1.5". It looks like the plant put in lots of its energy into producing a larger pitcher.