The Guerrilla Gardening Guidebook – Seed Bombs


“I Hijacked this Photo” – The seed bomb… This one is cleverly crafted to look like a grenade… I wouldn’t waste my money on these… The equivalent spent on loose seeds will go much farther than these ever could…

Seed Bombs

This post is part of a larger body of work titled ”The Guerrilla Gardening Guidebook”. For the introduction and table of contents please click here

Seed bombs, though a novel idea, I personally find to be pretty impractical. I am aware of the slack I may receive for this, but I am personally unimpressed with this trend. I say trend because the internet is full of articles and instructional videos on how to make them, and once something is available in a vending machine… It is officially trendy…

The idea behind the seed bomb, in my mind is more or less urban folklore. Situations that require one to have to throw seeds more than a few feet are the exception, not the rule. I find it is much easier to simply carry your seeds and a small garden shovel in a bag and just work some soil and plant your seeds. A bag full of seeds is jokingly lighter than a bag full of the equivalent amount of seeds formed into balls of clay… Or essentially a big bag of rocks… To this trend I say, get real!

A seed bomb is a combination of seeds, soil and fertilizer bonded together with some type of local clay. Some of the trendy new “store-bought” seed bombs are made of paper mache, intended to melt away in the rain before germination. A quick Google Images search for “seed bomb” returns thousands of photos, but if you look through them you won’t find even a single photograph of a mature garden created by a seed bomb. The closest thing I was able to find are photos of plants growing places the seed bomb was not actually needed.

Although some seeds will germinate on the surface of the soil, most do not. Seeds typically require uninterrupted levels of moisture and absolute darkness to properly sprout, any disruption in this process will ultimately kill the seeds. Scenarios where the seed bomb would actually apply, such as high fences and abandoned industrial sites, are not suitable for what is essentially a broadcast style of seed dispersal. Conditions would have to be perfect with cloudy skies and daily rain for the better part of two weeks for germination to take place.

Now that is not to say that there aren’t exceptions to this, many plants can be sown by simply broadcasting them over the soil. Many annuals disperse their seeds via wind, these could theoretically work well in a seed bomb. Many perennial plants often require stratification, and even after they require specific conditions to induce germination, for this reason they are typically not suitable.

The idea of throwing a bunch of “green grenades” is dreamy, and I understand the allure. But it all comes back to the whole idea of no work gardening, there is just no such thing. Weeds often grow faster than any seed in a seed bomb. A truly unmaintained area will quickly outgrow most of what you can pack into a seed bomb… In my experience the seed bomb always loses to weeds…

plant petunias and question everything – chriscondello

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