Let’s talk about seed bombs
They’re pretty cool, right? Planting flowers, saving the bees, guerilla gardening, what’s not to love? But there are some things to consider before jumping in, in order to ensure that they are effective and to avoid causing any harm to the local ecosystem.
Many of the seed bombs available for purchase are… less than responsible about what kinds of seeds they use, even the ones that advertise as native. Read the list of species, look them up, ascertain whether or not they’re actually native to your specific region. Take the U.S. for example. It’s a massive country, and while a particular plant may be native to the country in general, it may be native to a state on the opposite coast. Do your research, make sure the seeds are actually native to your specific area.
Some resources to help with that*:
https://www.audubon.org/native-plants
https://www.wildflower.org/plants/
https://www.nwf.org/NativePlantFinder/Plants
https://xerces.org/pollinator-conservation/pollinator-friendly-plant-lists (scroll down on this page and there’s some international resources, too)
This one is a bit harder, because there are so many variables. Is the soil bare? Why? Is the soil so poor nothing will grow there, not even the most tenacious weeds? Is it high traffic? Is it heavily compacted? Some kind of pollution leaking into the soil and making it inhospitable?
Or is the soil covered? Is it grass? Is it a native grass? Does it get mowed? Is it going to get sprayed? If it isn’t grass, what’s already growing there? Is it native species? Is it naturalized, polite, nonnative species that aren’t threatening the biodiversity of the regions? Or is it a highly invasive nonnative that will choke out anything else trying to grow?
Observe the area for a while. What kind of sunlight does it get? Is it wet? Dry? Is there erosion? Mixing many different types of seeds together into one bomb might not be the best idea - even plants that are native to your area can have vastly different needs. The resources above should also have information about the growing conditions for the plants. Again - do your research.
Not to stir the pot too much, but honeybees, while facing issues due to pesticides primarily, are not really in danger of extinction, they’re supported by humans enough to survive. Native bees, on the other hand, are, and we depend on them just as much, if not more, for pollination of our food than we do on honeybees. Pretty much globally, native bees and other pollinators and insects in general are in dire straits. They are desperately in need of love, less poison, habitat, and food sources. So, what kinds of bees and other pollinators do you have in your area? Which ones are most threatened? What do they eat? Where do they live? Many times, native insects have their own niche they fill, with specific plants that they depend on, and those plants depend on those specific insects in return. It’s pretty fascinating to do a deep dive into local insect and plant species, and their interactions. Once again, research is the way to go!
https://www.nrcs.usda.gov/wps/portal/nrcs/main/national/plantsanimals/pollinate/
https://saveplants.org/pollinator-search/
Ok, some of the recipes I’ve linked below call for absurd amounts of seeds per batch - don’t do it. The seeds won’t spread out, so they’ll all be attempting to grow in maybe a few square inches of space at the most. Each bomb should only have a few seeds, otherwise in their fight for space, sun, nutrients, and water, they’ll all die. Putting a dozen or more seeds in a single bomb is wasteful, expensive, and counterproductive. There is literally no benefit to it, please, for the love everything green and growing in the world, don’t do it.
Now that we’ve covered some of the things that need to be taken into consideration, let’s talk about how to actually do this, hopefully successfully!
1. Seriously consider making your own! The process of making them involves wetting all the ingredients, including the seeds, which may start the germination process. If they then dry out again, they likely won’t grow. It will likely work best to make them right before planting, and toss them before they have a chance to dry too much. Also, if you make your own, you can be 100% sure that the species are well suited for the area, because you’ve done your research! Good for you, working hard to ensure those little bombs have a big impact!
Here’s some recipes, take your pick! (But, as mentioned above, ignore the parts that say to use too many seeds - you only want a few in each bomb. depending on the type of seed.)
https://www.wildlifetrusts.org/actions/how-make-seed-bomb
https://littlebinsforlittlehands.com/make-seed-bombs-earth-day-activity/
https://seed-balls.com/basic-seed-ball-recipe
And a handy image via this site:
[photo id: a graphic titled How to make seed bombs. Below it reads: You will need: meadow flower seeds or seeds collected from the garden, peat-free compost, water, powdered clay from craft shops - use clay soil if you can’t find any, mixing bowl. 1. In a bowl, mix together 1 cup of seeds with 5 cups of compost and 2-3 cups of clay powder. 2 Slowly mix in water with your hands until everything sticks together, then roll mixture into firm balls. 3 (no words, but a drawing of seed bombs laying on grass). 4 Now for the fun bit - plant by throwing your seed bombs at bare parts of the garden!]
2. Toss them out in the spring (or whatever season they germinate best in), when you know there will be a few rainy days in row. Seeds need wet to germinate, and good, steady moisture for the first bit of growing. If that isn’t feasible in your region, consider going back to water them gently at least once a day for a few days or a week or more, until the seedlings are strong enough to withstand a bit of drought. Unless, of course, the seeds are wet loving, and have been tossed somewhere that already maintains a decent moisture level for them.
Collect from native plants already growing in your area, that you have permission to collect from, or that are on public land. Make sure you are 100% sure of your id - don’t want to be spreading invasive species around!
Buy them from a reputable source such as*:
https://www.prairiemoon.com/ (they have lots of awesome info about native species in north america - a great resource!)
https://www.nativeseeds.org/ (focuses on food crops mostly, but a fantastic resource all the same)
https://www.seedsource.com/
Another method if you’ve got space is to buy seeds, but plant them in your own garden and collect seeds from them. Those seeds can get really expensive, so this way you only need a few, and then with time they’ll multiply!
Try to make connections with people in your area already growing native plants - they’ll probably be happy to help you get started with some seeds!
Phew that was a lot of information! I hope it helps you all in your bombing adventures!
*North America focused, I’m sorry, I tried to find resources and databases for other regions and couldn’t find ones that looked reliable or comprehensive. If anyone has any, please add it on or send in an ask.