How to Make Your Own Seed Bombs

Guerrilla gardening may use the language of civilian warfare, but floral beauty is the uniting cause. Gardening without permission is another way of describing these activities: not strictly legal but filed away by the authorities under the category of “What’s not to like?” Alex Mitchell in her book The Rurbanite shows the editors of Gardenista how to make seed bombs, using guerrilla tactics to spread cheer.

Above:†Photograph by†LeeWilshire via Flickr.

A “rurbanite” is someone who has “a passion for the countryside but no intention of leaving the city,” says Alex Mitchell, adding: “A growing band of rurbanites is getting in touch with the green side of the city.” Enter guerrilla gardening.

Seed bombs are best, and the most fun, when thrown into neglected roundabouts, central reservations, flowerbeds and planters,” says Mitchell.

Many guerrilla gardeners arm themselves with trowels and work nocturnally. But with seed bombs it is possible to make a difference without that considerable commitment; lob a bomb from a bicycle, a car window or when passing on foot.

Seed bombing is best done in spring and autumn, says Alex Mitchell. Or, time your attack to coincide with heavy rainfall.

Above:†Photograph by Kendra Wilson.

Before seed bombing, assess a site for sunniness and choose your seeds accordingly. They do not need to be sun-loving annuals: foxgloves would suit a shadier site. Cosmos (Above), a classic annual, is a perfect candidate for guerrilla gardening.

Above: Photograph†via†Kyle Books.

Different types of seed may be combined to make a seed bomb, says Alex Mitchell, but check that they can all be sown at the same time of year.

Best flowers for seed bombs: for sunny areas, annual meadow flowers including poppies, cornflower, marigold, Californian poppies, cosmos, hollyhocks, nigella, verbena bonariensis, viper’s bugloss. For shady areas, use a†woodland seed mix, foxgloves, tobacco plant, honesty.

The instructions are simple enough, a bit like making chocolate truffles. Takes 30 minutes.


  • Flower seed
  • Potter’s clay powder, from any craft shop
  • Peat-free compost
  • Water
  • A bowl
  • A baking tray


Mix the seed, clay, and compost together in a bowl to a ratio of three handfuls of clay, five handfuls of compost and one handful of seed. Then carefully add water slowly and gradually (you donít want it too gloopy), mixing it all together until you get a consistency that you can form into truffle-sized balls. Lay them out to bake dry on a sunny windowsill for at least three hours.

Learn more inventive ways to bring some country into the city from The Rurbanite.


Elena Poensgen
Elena Poensgen2 years ago

Thank you

Tanya W.
Tanya W2 years ago

I have grown cosmos before. They are gorgeous. They can take over in a madcap way but that's what wildflowers do.... If you haven't tried them that n give them a go!!! They are pure happiness 🌸🌻🌸🌻🌼🌻🌸

Tanya W.
Tanya W2 years ago

This sounds really interesting and beautiful 🌾🌼🌿

Tanya W.
Tanya W2 years ago

Thanks for sharing 🌸🌻🌺🌻🌼

Nimue Pendragon

Sounds like a fun thing to do :)

Panchali Yapa
Panchali Yapa3 years ago

Thank you

Wim Zunnebeld
Wim Zunnebeld4 years ago


Sue Matheson
Sue Matheson4 years ago


Rehana VN
Rehana VN4 years ago

Footloose & Fancy free gardening. Fun way of adding colour.Thanks

Emil Perera
Emil Perera4 years ago

Seeds first they die after that start to grow and jutting out small bud and grow big .Interesting article