Back when I've just started,  I was so extremely delighted with my very first vermicompost. It wasn't so bad with the waiting. Every other day I'd go and have a peek at my bins. Yep there they are. Those lovely football-shaped castings lying in a neat pile.I was so very proud until a friend of mine ask me what's the CN ratio of my pile of casting.

Feeding your vermi is crucial when the quality of casting is a consideration. It's not just throwing in whatever organic material you can lay your hands on. Below is a table of CN ratio of the materials that you feed to your vermi.  

Vegetable wastes 12-20:1    
Cabbage             12:1   
Tobacco                 13:1   
Cow manure         20:1   
Leaves                 40-80:1   
Corn stalks/stover 55-60:1   
Soybean stover         32:1   
Peanut straw         20:1   
Sugar cane trash 116:1   
Oat straw                 74:1   
Wheat straw         80-105:1   
Paper                 150-200:1   
Sawdust                 100-500:1   
Grass clippings   12-25:1   
Coffee grounds         20:1   
Rice straw                 50-105:1   
Rice hull              91:1   
Sesbania                18:1   
Water hyacinth        18:1   
Bark                        100-200:1   
Fruit wastes        35:1   
Poultry manure (fresh) 10:1   
Poultry manure (old) 6.7:1   
Horse manure        25:1   
Swine manure        8.4-13:1   
Cattle manure       16:1   
Sheep manure         29:1   
Human manure       8:1   
Sewage sludge       8.7:1   
Newspaper      50-200:1   
Pine needles      60-110:1   
Rotted manure     20:1  

Thanks to Joel Adorada (vermicompost_owner mailling list)