20 Bear Grass Sasquatch Balls. The Ultimate Seed Bombs for the Western US. (Xerophyllum tenax) 20 seed balls, about 3/4" diameter. Fun and easy way to plant wildflowers Contains nutrient rich volcanic minerals, 3 kinds of compost & biochar Engineered by a PhD in Soil Science Available in many Western US native wildflower species. Designed to grow in complex soils of the Western US.