Long-Fiber Sphagnum vs. Peat/Perlite: Soil Mix Longevity for Carnivorous Plants

A grower uses 1:1 long-fiber sphagnum (LFS) to peat moss for a Venus flytrap and asks if it causes rot. The expert says short-term it's fine, but LFS breaks down quickly in constantly wet conditions, becoming anoxic and mucky – especially in heat. Peat degrades slower. For longevity, switch to peat/perlite or peat/sand; the mineral components maintain aeration. Repot annually if using LFS. LFS is also more expensive.