What sort of Soil Is Greatest? Venus fly traps thrive in damp, acidic, nutrient-poor soil. To recreate it indoors, use a 1:1 combination of peat moss and perlite. A mix of soil mix with peat moss, or horticultural sand with an equal amount of peat moss also will work perfectly. https://flytrap16005.onesmablog.com/detailed-notes-on-gumbo-weed-71863616