What are Balls?
Special kiln-fired Clay Pebble Grow Rocks, lightweight aggregate that is super-heated and formed into pebbles 8-16 mm in size.
The ceramic shell and inner pore structure retains moisture and releases it back to your plant’s roots as needed. Grow rocks will not compact, ensuring excellent aeration for the life of your plant. It is reusable and lasts indefinitely, making it a great value. Grow rocks are excellent in hydroponic systems.