Alternative Soil Mixes for Carnivorous Plants When Peat Moss Is Unavailable

A grower with 60 seedlings entering their third season needs to repot but cannot find fertilizer-free sphagnum peat moss. A hydroponics store suggested compounded clay or rock wool. The grower has live sphagnum moss (propagated from leftovers) and perlite, and asks if a sphagnum-perlite mix works for Venus flytraps and Sarracenia.

Peat Moss Substitutes

There is no true substitute for peat moss for North American carnivorous plants. Avoid clay and rock wool entirely.

Recommended Alternative

Use dried sphagnum moss (not live) mixed with perlite:

• North American plants (flytraps, Sarracenia): 1 part dried sphagnum moss : 2 parts perlite
• Nepenthes: 1 part dried sphagnum moss : 3 parts perlite

This provides the acidity, moisture retention, and drainage these plants require. Order peat moss online if local sources are unavailable.