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BLACK GOLD lists their Castings Blend as: Earthworm castings, Canadian Sphagnum peat moss, and they mention a fertilizer charge (0.8-0.0-0.0). Cornell University has tested Worm Power and various worm castings producers and shown there is a great deal of differences. The University of Georgia...

Black Gold is not quality earthworm castings. It is black humus from the bottom of bogs or ponds. If you want quality castings, purchase from A-Worms-Tale.Com or Worm Power. A Worm's Tale Enhanced Maxim Grow Multisource Castings tests as the best castings available in the US. Expect quality...

Black Gold is not quality earthworm castings. It is black humus from the bottom of bogs or ponds. If you want quality castings, purchase from A-Worms-Tale.Com or Worm Power. A Worm's Tale Enhanced Maxim Grow Multisource Castings tests as the best castings available in the US. Expect...