My father had a rhubarb plant. It is over 30 years old. Every year I put a bag of composted manure on it and it did OK.

Then I remembered going to a cottage and noticing huge rhubarb on a farm just I entered a small town, Burn River. One day I stopped and jumped the fence to take a close look.

The rhubarb was enormous, leaves like umbrellas and stalks as big as my arm. I wondered what variety it was.

Got back in my car and saw it. The farm was on a slope. The rhubarb was on the low side of the barn so all the urine from the animals fed the rhubarb.

So I collected my (male) urine and tried it on dad's rhubarb patch, it exploded to twice the size, huge leaves and stalks.

And it is much cheaper than buying a bag of manure.