Calcined Clay is an essential bonsai material for bonsai soil mixes. Calcined or thermal treated clay helps to give bonsai soil mix proper aeration for oxygen by allowing proper spacing for roots to grow. Calcined Clay also has an added feature in that it changes color when watered, giving you a visual cue as to how dry your bonsai is. Highly recommended. Our medium sized turface has been sifted of finer particles for larger bonsai tree pots.

Turface Calcined Clay information:

• Amounts: 3 Dry Qt (Fills 8"-10" pot), 5 Dry Qt (Fills 12"-14" pot), and 15 Dry Qt (Fills 20" + pot)
• Ingredients: Turface Calcined Clay
• Excellent for drainage
• Provides aeration