guerrilla gardening 

If you understand graffiti as a "'guerrilla art' attempting to reclaim public space through clandestine and spontenous intervnetions of areseol on walls," then you can easily make the jump to "guerrilla gardening" as a parallel idea - replacing the 'areseol on walls' with 'seeds in soil.'

Concered Citizen: GMO crops are overtaking our eco-system, we need to act in the name of the enviroment and human dignity!
Citizen Anarchist: Let's do some guerrilla gardening!?
Concered Citizen: Hi-oh!< high fives ensue >

guerrilla gardening by Mark Fox March 15, 2005

big shovel gardening 

Using a large plot of land to bury suspiciously wrapped "plants" six feet under where no one will ever find them.

"Hey did you see Joey at the party?"
"Nah, he had to go do some big shovel gardening this weekend, real messy business"

big shovel gardening by billythemurderer August 15, 2021

Midnight Gardening 

The act of burying valuables in one's yard under the cover of night so as to be less conspicuous.

My husband wants to hide his gold coin collection. So, he's doing some midnight gardening tonight.

Midnight Gardening by E-Squared 87 July 2, 2020

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

extreme gardening 

yiff. Usually with a heterosexual style, connotates the idea of a male "seeding" a female.

"Darius said he was too busy to come to the party, but I say he's doing extreme gardening with that online girlfriend of his."

extreme gardening by Chromium February 19, 2006

gutter gardening

When u do so little house maintenance shrubs grow from your gutters

I see joe has given up on caring for his house.

Friend: yes but i see he has taken up gutter gardening

gutter gardening by Drowning clown November 24, 2015

basil_gardening_scissors 

baisl
made fun of for a spelling error they made, i will defend them

“i can’t believe basil_gardening_scissors misspelled basil, yikes”
“yeah okay and what about it you pissbaby”

basil_gardening_scissors by astraoria July 3, 2021