I've been having an issue with a few nepenthes, and I'm wondering if anyone has figured out the solution. They're growing fine up top, but they lose old leaves as quickly as they gain new ones. Over time this leads to a rosette with five or six leaves sitting on top of a tall woody stem. In my experience this can only happen for so long before the plant begins to suffer. Growth slows and new leaves start getting smaller, and if you're lucky you can start over by cutting off the rosette and rooting it, but at that point the plant is lacking energy and the cutting may fail.
I don't know what causes it. It's like the plant is abandoning its roots, but why? I suspected root rot, but I've found plenty of roots under some of the these plants. I suspected insufficient drops in night temperature, but my night drops are decent these days, and one of the plants suffering is an ampullaria which I've never known to need much of a night drop. I suspected a fungal infection but I've treated with systemics many times. I suspected insufficient light, but these plants are growing alongside dozens of healthy plants in the exact same conditions. I'm at a loss.
Any similar experiences? What has worked and what hasn't?
I don't know what causes it. It's like the plant is abandoning its roots, but why? I suspected root rot, but I've found plenty of roots under some of the these plants. I suspected insufficient drops in night temperature, but my night drops are decent these days, and one of the plants suffering is an ampullaria which I've never known to need much of a night drop. I suspected a fungal infection but I've treated with systemics many times. I suspected insufficient light, but these plants are growing alongside dozens of healthy plants in the exact same conditions. I'm at a loss.
Any similar experiences? What has worked and what hasn't?