Seed Bomb Instructions

What is a Seed Bomb?

Seed bombs are balls made from a mixture of soil and plant seeds. When tossed into an open field, the seeds will germinate and grow. The Westerly Land Trust’s own seed bomb recipe uses native wildflower seeds that are beneficial to insects and birds.


  • Native wildflower seeds (Great choices: Milkweed, Goldenrod, Lupine, Golden Aster, Joe-Pye Weed, Wild Indigo)
  • All-Natural potter’s clay powder in a natural soil-like color (found at craft stores)
  • Peat-free compost
  • Water
  • Large bowl for mixing
  • Large baking tray for drying


Mix the seeds, clay, and compost together in a bowl to a ratio of 3 parts clay, 5 parts compost and 1 part seed. Then carefully add water slowly and gradually. Mix it all together until you get a consistency that you can shape into small 2″ balls. Lay them out to dry on a sunny windowsill for a couple of hours. Do not leave them to dry out for days or bake in hot sun. After they have dried enough to handle, take them outside and toss them in your garden or a sunny field! The best time to do this is in spring or fall.


Upcoming Events

  1. All Ages Hike at Glacier Park

    December 17 @ 2:00 pm - 3:00 pm
  2. Thursday Hike at Dr. John Champlin Glacier Park, Westerly

    December 21 @ 10:00 am - 12:00 pm
  3. Thursday Hike at Grills Preserve, Westerly

    December 28 @ 10:00 am - 12:00 pm