I have been dumping my spent grain out by the fence in the backyard for sometime. This spring, I took the garden tiller and made a row along the fence to plant cucumbers.....I had earth worms as big and long as a new pencil, They were inside the grain, just under the grain, Too bad I was'nt going fishing, anyway I planted 4 cucumber plants in the compost of dirt and spent grain, They are growing like crazy, I have made 3 gallons of pickles so far.