Night Gardening 

Pooping in your bed while sleeping.

I woke from a drunken sleep and saw I'd been night gardening.

Night Gardening by goatsilk December 19, 2012

late night gardening 

the act of breaking up, smoking, growing, or baking marijuana

man i was late night gardening last night

late night gardening by kuhayeluh January 10, 2010

Gardening at night 

The act of urinating in bushes after dark. The phrase is attributable to the R.E.M. song of the same name, written after the band was driving in a van after a show in the early 1980's and directed the van's driver, drummer Bill Berry, to pull to the side of the road so that the other band members could engage in some "night gardening" on the roadside bushes.

The cops gave him a ticket because he was caught gardening at night over off Broad Street.

Gardening at night by Laertes513 February 17, 2015