No. Green Base XR does not contain any peat nor pumice. Instead, Green Base XR uses hardened montmorillonite clay which has a very high capacity for holding micronutrients in the form that is available to plants. It also contains nutrient granules with extended-release technology which actively releases a complete balance of macro and micronutrients into the substrate. Both components work together to supply your substrate with prolonged nutrients for lush, healthy plant growth.