An Indian Minister’s Tip for Fertilizing Plants: Use Your Urine

India’s Road Transport Minister Nitin Gadkari said he uses his urine to grow his plants faster.

“This is free homemade fertilizer,” Gadkari said in a televised speech on Sunday in the city of Nagpur. “I’m only telling you about urine, and not going further than that.”

The minister said he pours urine stored in small plastic bags into a 50-liter (13-gallon) can for use as fertilizer. He said nutrients such as nitrogen help plant growth, echoing a farming tip going back centuries.

India’s NDTV reported Gadkari was at a workshop organized by the ruling Bharatiya Janata Party on tackling drought.

Gadkari, a cabinet minister in Prime Minister Narendra Modi’s government, sends vegetables from his garden to next-door neighbor Sonia Gandhi, the president of main opposition Congress party, the Economic Times reported April 15.