James Bond, eat your garden out. Vanessa Harden is a Q-style designer of covert gardening equipment. She lives in London, supplying herself and a small contingent of co-guerrilla gardeners with tools of the trade. What's a guerrilla gardener? Someone who sees an ugly roundabout or a barren median and takes matters into their own hands. Sometimes they get stopped by the police -- but not when they've got Vanessa's flowerpot-dropping handbags or seed-planting cameras. After all, says guerrilla gardening guru Richard Reynolds, "when you're guerrilla gardening across the road from MI-5, you've got to be a bit covert about it."

Motherboard.tv sent a crew to London to capture all the nerdy, green-thumbed fun.