He said "peat is the favoured constituent" for most growing-media applications but environmental concerns mean producers must be transparent about CO2 emissions and publish any data they have collected.
Klasmann published a "brave" sustainability report this summer, he added.
The industry must change public perception that peat extraction kills ecosystems, boosts global warming, loses biodiversity and is not sustainable by communicating and lobbying correct facts.
He said: "Our opponents have managed to paint a picture of the dirty industry to the public and we have not been able to hinder them."
The German peat industry is "struggling for survival" because politicians in Lower Saxony are planning to phase out extraction in the region, added Siebels. He pointed out that peat companies must work together to lobby through EPAGMA and the International Peat Society, rather than going it alone.