As for burning, last year whenever i planted a new Daylily i dumped half of cup of Milorganite right into the hole and then watered, backfilled and watered again. I also tilled plenty of it right into new beds and sprinkled it all over established ones. I like it because its low grade, organic and easy to handle. I bought a 5 gallon bucket to keep mine in.
I have also yet to see any plants gone wild or acting strangely because of any possible drugs in the product. I probably would not use it on vegetables but then again what is Really in our cereal?
