I just found that I have access to an almost infinite supply of worm castings. A friend of mine works on a rabbit farm and they bag the manure and castings as two separate by products. Now, if I was to put 25lbs of castings in a 4X10 bed, 10" deep, would that be too much?

I purchased some castings in the spring and the directions stated to use about 1/2 cup per plant outdoors. I bought the bag of castings over the internet. There are alot of websites that sell this that could tell you more. My plants are doing well but I also used other fertilizers.
Terry