Constructed from Canadian sphagnum peat moss, Peat Pots 4 Inch Round Seedling Pots promote abundant aeration, uniform drainage, and easy root penetration for healthy seedlings. Transplant shock is greatly reduced because the entire pot can be planted with the seedling when roots show through the wall. Pots indicate need for water by turning light brown when dry. Dimensions: 3 7/8" outside diameter and 3 3/4" tall (slightly smaller due to shrinkage). For sustainable alternatives, see also our Peat and Coconut Fiber Pots & Pellets. 📋 Product summary: Material: Canadian sphagnum peat moss Aeration and drainage: abundant aeration, uniform drainage, easy root penetration Planting method: entire pot can be planted with the seedling to reduce transplant shock Water indicator: turns light brown when dry Size: outside diameter 3 7/8 inches; height 3 3/4 inches (shrinkage makes it slightly smaller) Sustainability note: see also Peat and Coconut Fiber Pots & Pellets