Byron, IMO, it's caused by an overdose of nitrates and phosphates as a plant need those to make cells. But it might be a combination of temperature water and fertilizer, I know that by some experiments I've done, that some combinations of phosphate, nitrate and magnesium can cause strange growing effects. Hot regards Rob NL -----Original Message----- Subject: [CH] Thick walled peppers Has anyone heard of a growing condition that might cause a normally thin walled pepper to be thick walled ? TIA Byron