A 4-year-old N. ventricosa declined after repotting into 1:1:1 peat/perlite/coarse white sand (possibly not silica). Leaves wilted, rolled, turned black.
Nepenthes need rapid drainage and root aeration. Transplant into equal parts long-fiber sphagnum, orchid bark, perlite. Soak in Superthrive, trim bad leaves. Roots may be too far gone, but worth trying.
Good Growing!
Jeff Dallas
Sarracenia Northwest
https://www.cobraplant.com
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