Seed Bombs

Seed Bomb

Seed bombs are a way to revitalize a neglected area of land.
Only use native seeds – never plant invasive species. You will need to do the research on what plants are best for your area.

What is your goal? Beautification? Pollinator Plants? Food for songbirds? Soil Enrichment?

Where to Re-Seed?

Observe the land for a long period of time, purchase so you can see if the land is appropriate for your native seeds.
Questions you might ask could be:

Who does this land belong to – do I have a right to spread seeds here and what is the implication if I do?

Will the plants be moved down or torn up by city workers?

Are the plants invasive species (don’t plant them!)

Are the plants native to this area?

Is this a clean and safe area for these native seeds to grow?

Is it an appropriate habitat?

What is the soil like – dry? marshy? clay?

Is their enough sun/shade for these native plants to grow?

Seed Bomb

How to Do It

Red and brown clays contain rich minerals that help nourish seedlings and protect them in a compact ball until conditions are right for them to germinate. There are many recipes for seed bombs out there, buy information pills this is one variation:

Combine 1 part seeds with 1 part compost in a large container. Add 1 part powdered red or brown clay* (the kind ceramists use) and mix. Gradually moisten with water until you have a pliable, but not soggy, mass. The right consistency is one that holds a ball shape without sticking to your fingers. Pinch off a hunk of clay about the size of a penny (for small balls for a garden area) or a loonie (for larger balls for land rehabilitation). Roll this between your hands until it forms into a tight ball. The sphere should be about 3/4 to 1 inch (2-3 cm) in diameter.

Let the balls dry on newspaper or in an empty egg carton (easy to transport) – about 36-48 hours. Store in a cool, dry place until ready to sow.
The best time to sow is in late winter or early spring. Throw about 10 balls per yard (.83 square metre). Provided you choose the correct habitat, they’ll begin to grow when the time is right.

You can get clay from:
The Pottery Supply House Limited
1120 Speers Rd, Oakville, ON L6L 2X4

*If you can’t get clay – try using flour – mix it in when the compost/seed mixture is dry… add water… mix until it becomes pliable and hold a ball shape… add more flour if needed. Flour can make the balls go moldy if they don’t dry out quickly. You may need to help them out by putting them over a heating vent or put a fan nearby to remove the moisture.


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