FACTBOX: How to be a Guerrilla Gardener

(Reuters) - Guerrilla Gardeners are an illicit movement taking hold of urban wastelands in some of the world's biggest cities and turning them into mini-gardens for the community to enjoy.

In his handbook, "On Guerrilla Gardening", Richard Reynolds outlines campaign tactics. Here is a list of essential items in any would-be Guerrilla Gardener's arsenal:

Seed bombs

-- In its purest and simplest form, Guerrilla Gardening is little more than scattering seeds in places where, with time, they will sprout to fill the air with color and scent. Some veterans have even fashioned gun- or grenade shaped "bombs" of damp compost mixed with seeds.

Tough plants

-- The cheaper and hardier the plants, the better. Choose varieties that can withstand cold, drought, neglect and abuse by pedestrians, road users and dogs.

Bulbs

-- Hidden time-bombs whose impact returns year after year. Guerrilla Gardeners often fill their pockets with daffodil bulbs and secretly pop them into neglected pots or around the base of tress on rough grassland as they pass.

Chemical weapons