Make Your Own Seed Bombs

IMG_7013We’ve been making and selling seed bombs for almost ten years and it is still fun to introduce people to the simple process so they can make it their own.

Making seed bombs is a fun and easy way to take some direct action to restoring habitat for pollinators wildlife and even for our own gardens. There are countless way to make them and while not all seeds are suitable for seed bombs as a growing medium there are plenty wildflowers, herbs and grasses that do perfectly well. 

Before you start throwing seeds in your yard, or anyone else for that matter, it is important that you verify what types of seeds are most beneficial to the area where they will be. Be sure to avoid any seeds that could be harmful in your area. With the research out of the way you’ll be ready to get your hands dirty.

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Materials & Supplies

For the seed bombs you will need

  • 5 parts of clay
  • 3 parts worm castings
  • 1 part seed

In addition to the materials you will need the following supplies:

  • a pitcher of water
  • a 5 Gallon Bucket
  • 1 or 2 Mixing Bowls
  • some old rags
  • some butcher paper or other drying surface
  • a house

Preparing your Work Area
Making seed bombs can be a messy endeavor, plan to work in a space that can get dusty and even a little muddy. Have your materials ready and rags nearby, cover any important furniture in your workspace. Once you start rolling the seed bombs it best to finish the mix that you made and leave the material in place for about 24 hours. You can move the seed bombs in as little as 2 hours, but they will need open air for 24 hours to dry properly and maybe even more in humid environments.

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Mixing
With your area ready, you can measure the clay, castings and seed and place them together in the 5 gallon bucket. Slowly mix the dry ingredients by hand until blended. Add water a few ounces at a time continually mixing it into the dry ingredients until the consistency resembles a thick dry cookie dough. It should be easily malleable, but not sloppy.

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Rolling

Seed bombs come in all shapes and sizes but there are a few principles to keep in mind when portioning out and forming your final product. You want to make them big enough that they can be thrown and contain a reasonable amount of seed, but are also easy to transport and not too large to dry properly. When you are shaping them it is good to apply enough pressure so that the form holds, but not too much so that the seed bomb doesn’t easily break apart when it hits the ground or your garden.

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Drying & Storing
As you roll or form your seed bombs place them a few inches apart on a flat surface to dry. After a few hours it is okay to rotate them or even remove them to take to a more convenient drying place. Once they have dried completely, usually about 24 hours later, you can store them in a cool dry place with low light. A reasonable amount of seed should remain fertile for up to a year, but we recommend that you use them in the first 3-6 months.

Deploying
When you are ready to spread your seeds find the appropriate growing conditions based on the seeds you selected. Make sure the soil type, light and water conditions are in the range of the majority of your seeds proper growing conditions and figure out where you’d like to see the flowers grow. Toss the seed bombs in to the location or break the seed bomb apart and spread it over the area evenly.

Spring is a great time to plant them because you not much time has to pass before you see the fruits of your labor. However, you can lay seed bombs at almost any time of the year and they will likely be ready to germinate in grow the following spring. Some seeds actually need a winters cold conditions to prepare for their growth the following spring.

Enjoy the fun and friendly activity that anyone can do at home, in school, church or just about any group activity.

If you have questions or need sources for supplies feel free to reach our and let us know.

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