A really good way is 7parts water to 1 part urine. This formula was told to listeners on the South`s `Radio Solent` programme by the head parks gardener and it really works, cheap too.
This is true. I bought my Mum a female urinal kit when she was ill. I now use it when my Dad's a long time in the bath and I add it to my compost bins. Sounds awful, but it works. I'm now using the compost from my bins and I'm amazed at how brilliant it is.